For a new player, the world of slot machines is full of English terms β Wild, Scatter, Multiplier, Sticky, Expanding, Walking, Stacked, Mystery, Bonus, Cash, Mini, Minor, Major, Grand. Each of these symbols has its own function and affects how the winnings fall, how powerful the bonus is and what the long-term return of the game is. Without their understanding, the player does not see why a particular bonus fell, how the final payout is composed and why the same slot has one dead, one extreme streak.
This article discusses the main types of slot symbols using specific examples from games commonly found in Ireland licensed casinos. It explains their mathematical weight, hit rate, effect on RTP and volatility β so that after reading, you can choose a slot that fits your play style and budget. If you want to first understand how long-term returns and winning fluctuations translate into play, it's worth going through how RTP and volatility are related , and look at volatility explained by half . For a detailed breakdown of the maximum winnings by size, see the article again real RTP Ireland slots .
Anatomy of the slot: overview of all symbols
Before we look at each type in detail, it is useful to have an overall map. Each online slot contains 8 β 14 different symbols, which are divided into two main groups: paying (they pay according to the winning line) and special (they change the game's mathematics).
| Group | Symbol type | Main function | A typical number in a slot |
|---|---|---|---|
| Payment | Low-pay (10, J, Q, K, A) | Smallest payouts for 3 β 5 matches | 4 β 5 symbols |
| Mid-pay (thematic) | Medium payouts, support the theme of the slot | 3 β 4 symbols | |
| High-pay (premium) | Highest payouts, top hand in the game | 1 β 3 symbols | |
| Special | Wild | Replaces pay symbols + often own payout | 1 β 2 types |
| Scatter | Triggers free spins, rated anywhere | 1 symbol | |
| Bonus symbol | Launches an interactive bonus game | 0 β 1 symbol | |
| Multiplier | Multiplies winnings Γ2 β Γ1,000 | 0 β 1 type | |
| Cash/Money symbol | Fixed value for Hold and Win bonus | 0 β 1 type (common in modern slots) | |
| Mystery symbol | After a spin, it turns into a specific different symbol | 0 β 1 type |
In a classic 5-reel slot (Book of Ra, Cleopatra) there are 9 β 11 symbols in total β typically 5 low-pay, 4 mid-pay/high-pay and Wild plus Scatter. In the modern Hold and Win slot (Big Bass Bonanza), a Cash symbol is added, which increases the total number to 12 β 14. Megaways titles can also have 14+ symbols including Mystery and a special bonus Scatter.
Paying tiers: low-pay, mid-pay and high-pay symbols
The standard hierarchy of pay symbols is repeated across the slots. Understanding the tiers helps you quickly gauge how strong a spin is before reading the paytable in detail.
| Tier | Typical symbols | Payout for 5 matches (multiple of bet) | Hit frequency |
|---|---|---|---|
| Low-pay | Playing cards 10, J, Q, K, A | 1x β 5x | Most common (40 β 50% of all combinations) |
| Mid-pay | Thematic objects (flowers, jewelry, characters) | 5x β 25x | Common (30 β 35% of combinations) |
| High-pay | Slot Theme (Cleopatra, Wolf, Pirate, Sphinx) | 25x β 200x | Rare (10 β 15% of combinations) |
| Wild | Joker symbol (often with its own game icon) | 50Γ β 1000Γ (often the highest in the game) | Very rare (5 β 10% of combinations) |
Visually, the tiers are distinguished by color and style: low-pay symbols are monochromatic or bright, mid-pay colorful with detailed illustrations, and high-pay distinctive with their own animation when winning. Wild and Scatter usually have a special frame or light effect β so that they are instantly recognizable. A separate article describes the detail of reading the pay table how to read a slot machine paytable .
What is the Wild symbol and how does it work?
Wild is one of the most important symbols in slot machines. Its role is the same as that of the joker in card games β it can replace any other paying symbol on a payline. For example, if you are one symbol short of completing a winning combination of three symbols in a row, the Wild will be substituted and the combination will be evaluated according to the paytable.
Three basic rules of Wild substitution:
- The Wild replaces all paying symbols EXCEPT the Scatter and the Bonus symbol.
- Wilds are evaluated according to the rules of the given line β typically from left to right for classic paylines slots.
- If the Wild also has its own pay, the combination is evaluated according to what is more beneficial to the player (Wild as its own symbol or Wild as a high-pay substitute).
Practical example: you are playing a slot with 5 reels and 10 paylines. On the first line you got A, A, Wild, A, K. Wild is interpreted as A, so you have 4 A symbols in a row (the combination stops at 4 A, because the 5th Position is K). A win is assessed according to the slot's paytable for 4 A symbols β typically 10 β 25 times the bet.
The Wild often has its own payout β typically the highest of all symbols in the game. With 5 Wilds in a row, the win can be 200 - 1,000 times the bet in classic slots and even 2,000 - 10,000 times in modern high-variance titles. A wild with its own payout is doubly valuable to players: it either completes an existing hand or pays out on its own.
Wild symbol hit rate: in a classic 5-reel slot with 25 paylines, the Wild falls once every 15 β 25 spins in the base game. For Megaways titles, the hit rate is higher (once every 10 - 18 spins) due to more positions on the reel. In free spins, the Wild is additionally "enhanced" β more frequent, sticky or with a multiplier.
Wild β Scatter: Wild and Scatter are often confused, but their functions are fundamentally different. Wild is a paying symbol that is evaluated on a payline as a substitute. A Scatter is a trigger symbol that scores off a line and activates the bonus. Wild cannot be used to trigger the bonus β real Scatters are required for this.
Special variants of the Wild symbol
Modern slots rarely use the "regular" Wild β instead supplementing or replacing it with their own variant mechanics. Below is an overview of the ten most common variants you will encounter in Ireland licensed casinos.
| Variants | Function | An example of a slot | Impact on volatility |
|---|---|---|---|
| Sticky Wild | Wild stays in position for several spins (typically 2 β 5) | Sticky Bandits (Quickspin), Joker Pro (NetEnt) | Medium to high |
| Expanding Wild | When landed, the Wild expands over the entire reel and affects all lines across that reel | Book of Ra (Novomatic), Book of Dead (Play'n GO), Book of Shadows (Nolimit City) | High |
| Wild with multiplier | Wild Γ2, Γ3, Γ5 β when matching on a line, the win is multiplied by a factor (multipliers are usually multiplied when there are more on the line) | Wild Toro (ELK Studios), Jammin' Jars (Push Gaming), Dog House (Pragmatic Play β Wild Γ2/Γ3) | Medium |
| Walking Wild | After each spin, the Wild "moves" one reel to the left or right to the edge | Jack and the Beanstalk (NetEnt), Pyramid: Quest for Immortality | High |
| Shifting Wild | Wild moves to another position after a win and generates new wins | Mystery Joker 6000 (Play'n GO), Stack 'em Up | Medium |
| Sticky Expanding Wild | Combination β Wild expands to the entire reel and more spins remain | Wanted Dead or a Wild (Hacksaw Gaming), Vikings Go Berzerk | Extreme |
| Stacked Wild | Wild falls in a stack β covers the entire reel at once (2 β 6 positions) | Wolf Gold (Pragmatic Play), Buffalo Stampede | Medium to high |
| Soaring/Random Wild | After the spin, the RNG places the Wild in random positions (typically in free spins) | Starburst (NetEnt β Random Wild Re-Spin), Pirate Gold | Medium |
| Tumbling/Cascading Wild | After a win, the wild does not disappear during the cascade β it remains for further combinations | Gates of Olympus (Pragmatic Play), Sugar Rush | Very high |
| Mystery/Transforming Wild | Hidden Wild that is revealed only after a spin (transformation from another symbol) | Razor Shark (Push Gaming), Reactoonz (Play'n GO) | Very high |
These variations dramatically change the math of the slot. The Sticky Expanding Wildy slot has the potential for huge wins in free spins (500x β 12,500x stake), but at the cost of extreme volatility β regular spins pay less. On the contrary, the classic Wild without special variants keeps the slot in medium to lower volatility, which is advantageous for smaller budgets or for bonus spin .
Beware of fake Wild: some slots (especially older titles from Novomatic, EGT) only have Wild on reels 2, 3, 4 β not the first or last. This means that Wild cannot be at the very beginning or end of the line, and a combination like Wild-A-A-A-K is not recognized. Wild substitution rules are always listed in the game's paytable.
Scatter symbol: the key to the bonus
Scatter is scored regardless of payline. All you have to do is land a certain number on the screen β typically 3, 4 or 5 β anywhere on any of the reels. Main features of Scatter:
- Triggering free spins. The most common feature β with 3 β 5 Scatters, a bonus round with free spins is activated. Typical range: 8 β 25 spins, in Hold and Win bonuses even 30+.
- Own paycheck. Some slots award the Scatter as its own win β 3 Scatters 10x bets, 4 Scatters 50x bets, 5 Scatters 100 β 500x bets even without the bonus game.
- Enter the bonus game. For some slots, Scatter triggers a mini-game, a wheel of fortune or a "pick and click" function β instead of free spins, the player gets an interactive bonus.
- Re-trigger during the bonus. Additional Scatters can fall in the free spins, which add extra spins. Typically 2 Scatters= +5 Spins, 3 Scatters= +10 Spins.
Scatter's hit rate: statistical reality
The frequency of falling Scatters is mathematically determined by the design of the game (RTP, volatility, number of "stops" on the reels). Exact hit rates are generally not disclosed by manufacturers, so the following values ββare rough estimates from public data and community measurements, not official numbers:
| Slot | Number of Scatters per bonus | Average bonus hit rate | Free Spins for 3 Scatters |
|---|---|---|---|
| Book of Ra (Novomatic) | 3 | 1 to 150 β 200 spins | 10 spins |
| Big Bass Bonanza (Pragmatic Play) | 3 | 1 to 150 β 180 spins | 10 spins |
| Sweet Bonanza (Pragmatic Play) | 4 | 1 to 180 β 230 spins | 10 spins (Tumble Multiplier) |
| Gates of Olympus (Pragmatic Play) | 4 | 1 to 200 β 260 spins | 15 spins |
| Razor Shark (Push Gaming) | 3 | 1 to 280 β 350 spins | 5 β 15 spins + Mystery |
| Money Train 4 (Relax Gaming) | 3+ | roughly 1 to 350 β 500 spins | Money Cart Hold & Win bonus |
The correlation is clear from the table: the higher the volatility, the rarer the bonus, but the stronger it is. High-variance slots (Razor Shark, Money Train) need twice as many spins for the trigger bonus, but the average return from the bonus is 2 β 3x higher than for medium volatility titles.
Tiered rewards based on the number of Scatters
Many modern slots do not award a fixed number of free spins β the reward depends on the exact number of Scatters that trigger the bonus:
- 3 Scatters: basic bonus (typically 8 β 12 free spins).
- 4 Scatters: extended bonus (12 β 18 spins + sometimes multiplier Γ2).
- 5 Scatters: maximum bonus (18 β 25 spins + extra features).
- 6+ Scatters: in Cluster Pays and megaways slots β a massive bonus with 25 β 50 spins.
In some slots, the Scatter can turn into a Super Scatter β a Scatter with a 2x or 3x value that also counts as two or three normal Scatters. Example: 2 Super Scatters + 1 normal Scatter= the equivalent of 5 Scatters, i.e. Maximum free spins. This is a common mechanism in slots by Push Gaming and Hacksaw Gaming.
For a complete overview of free spins as a bonus mechanism, see the article free spins β complete guide .
Multiplier: win multiplier
The multiplier is the factor by which the win in a given spin is multiplied. It was created as a way to add big payout potential to the game without changing the basic mechanics of the reels. Common values:
- Γ2, Γ3: most common in the base game. They add the winnings to the final payout.
- Γ5, Γ10: typical for free spins with average variability.
- Γ25, Γ50: in free spins games with an increasing multiplier (Wild Toro, Razor Shark) β exceptional values.
- Γ100, Γ250, Γ500: in free spins games like Sweet Bonanza, Gates of Olympus.
- Γ1,000 β Γ10,000: in top high-variance scenarios (Sticky Bandits, Money Train 4, Razor Shark).
- Γ25,000 β Γ50,000: theoretical maximum in Megaways titles with unlimited multiplier.
Five main multiplier mechanics
| Mechanics | Principle | An example of a slot | A typical contribution to RTP |
|---|---|---|---|
| Multiplier on symbol | The specific symbol carries a multiplier (Wild Γ3). If you match on a line, the win is multiplied. | The Dog House (Wild Γ2/Γ3), Wild Toro (progressive walking Wild) | approximately lower unit share |
| Global multiplier | The entire screen (or entire free spins) has one multiplier that can change during the bonus. | Rise of Olympus (Play'n GO), Vikings Go Berzerk | approximately lower unit share |
| Cascade multiplier (various models) | It changes with cascades β either the multiplier spot doubles at a given position (Sugar Rush: Γ2βΓ4βΓ8) or +1 is added at each shift (Razor Shark). Attention: it is not a universal "+1 after cascading". | Sugar Rush (double spot), Razor Shark (+1 nudge) | relatively high share of maximum wins |
| Falling multiplier (bomb/orb multiplier) | Random symbols with a multiplier value fall on the screen; at the end of the cascading series, their values ββare added up and applied to the total spin win. | Sweet Bonanza (Γ2 β Γ100, only in free spins), Gates of Olympus (Γ2 β Γ500) | roughly the highest share of maximum wins |
| Unlimited multiplier | The multiplier does not reset and only grows throughout the bonus. | Megaways titles (Bonanza Megaways, Extra Chilli) | 15 β 25% |
Multiplier math β a concrete example
Bet β¬1, win 5Γ bet= β¬5. If a Wild Γ3 multiplier also lands on the winning line, the win is multiplied: β¬5 Γ 3= β¬10. If, instead of a Wild Γ3, two Wilds Γ2 fall on the same line, the multipliers are multiplied: 2 Γ 2= Γ4, so the win= 125 Γ 4= β¬20. In tumbling slots, after each cascade the multiplier will increase β after 5 cascades with an initial win of 2x the bet and a multiplier of Γ6 (1+1+1+1+1+1), the total win at the end is 2 Γ 6= 12 times the bet.
In Sweet Bonanza and Gates of Olympus slots, the multiplier is the dominant source of top wins. In Sweet Bonanza, multiplier bombs fall Γ2 β Γ100 exclusively in free spins, in Gates of Olympus orbs Γ2 β Γ500 in the base game and in free spins; at the end of the cascade series, the values ββof all multipliers are added together. That is why most of the maximum wins (cap 21,100x in Sweet Bonanza, 5,000x in Gates of Olympus) come from this mechanic, not from basic combinations.
Bonus symbol: entry to the interactive game
The bonus symbol triggers an interactive bonus game β something that isn't part of the regular game. In some slots, the role of the Bonus symbol is the same as that of the Scatter (both trigger the bonus), in others they differ: the Scatter activates free spins, the Bonus symbol triggers an interactive mini-game. The most common forms of bonus games:
- "Pick and click" game: the player selects from several objects (chests, cards, dice) and each one reveals a win (or "collect"/end of the game). Examples: Wish Master (NetEnt), Beach (NetEnt).
- Wheel of Fortune: the player spins the wheel and gets a win depending on where the wheel stops. Examples: Wheel of Fortune (IGT), Mega Fortune (NetEnt).
- Mini game (skill-based): the player plays a short game, such as shooting, hunting or choosing a path. Winning depends on the result (mostly the result is preset by RNG, "skill" is visual). Examples: Daredevil (Playtech), Spider-Man (Playtech).
- Cash collect bonus: the player collects "coins" or "cash symbols" during several spins, which are added up at the end. Examples: Cash Eruption (IGT), Stack 'em Up.
- Hold and Win/Hold and Spin: a special form where the "cash" symbols are locked on the screen and the player has 3 spins to get more. See the article for details slot machines with locked symbols (Hold and Win) .
- Bonus level/path: the player progresses through the levels with increasing winnings (Aladdin's Cave, Da Vinci Diamonds Bonus).
Bonus frequency ranges from 1 once per 100 β 200 spins for frequent games (Wolf Gold) to 1 once per 500+ spins for high-variance slots (Razor Shark, Money Train). Some big bonus slots (Razor Shark Megaways) have a bonus only once every 700 β 900 spins, but its average win is 80 β 150x the bet.
There is an option in most slots bonus purchase (bonus buy) for 50 β 100 times the bet β where the legislation and the operator allow it. Some titles (Nolimit City β the entire portfolio, selected games from other manufacturers) have the bonus buy in the EU disabled by regulation.
Stacked symbols: stacked on top of each other
A stacked symbol is a symbol that can appear on a reel several times in a row β all positions on the reel contain the same symbol. In a 5-reel slot with 3 lines, the Stacked symbol can fill the entire reel (3 positions of the same symbol on top of each other), in Megaways titles even 7 positions. Main categories:
- Stacked Wild: The Wild covers the entire reel or a large part. It guarantees a win on all paylines that pass through that reel. For a classic 25-line slot, this means winning from 25 lines at once.
- Stacked high-pay symbol: the highest symbol in the game (typically a theme β Wolf, Cleopatra, Buffalo) covers the entire reel. Stacking the same symbols on multiple reels results in a huge win.
- Stacked Mystery: the entire reel is filled with Mystery symbols that turn into the same symbol (Razor Shark) after a spin.
- Synchronized Stacks: the same stacks fall on multiple reels at the same time, increasing the probability of huge wins (Buffalo Stampede).
An example of the Stacked symbols mechanic: the Wolf Gold slot (Pragmatic Play) has the Wolf symbol as a Stacked Wild on all reels. When the Wolf stacks line up across multiple reels, a win is created from every payline that crosses them. This is an illustrative principle β the specific payout depends on the value of the match in the game's paytable. Wolf Gold's max win is 2,500x the bet, and the highest wins in it come via the Money Respin and the fixed Mega jackpot (1,000x the bet), not a single "full screen" spin.
Mystery symbols: a surprise after every spin
A mystery symbol (or Mystery Stack) is a symbol that turns into a specific other symbol after the end of the spin. Key Mechanism: ALL Mystery symbols on the screen will turn into the same symbol β never each into a different one. That is why the Mystery symbol is one of the main sources of maximum winnings in modern high-variance slots.
An example of the mechanics: 8 Mystery symbols will fall on the screen, distributed along the reels. After the spin ends, the RNG selects a target symbol β say "A". All 8 Mystery symbols will change to A. The player has 8 A symbols on the screen which form multiple paylines β winning typically 200 β 500 times the bet.
Mystery symbols can also cover entire reels in free spins (Mystery Stacks). Razor Shark (Push Gaming) uses Mystery Stacks in free spins where the entire reel can contain Mystery symbols. When converted to the highest symbol of the slot, a win of 1,000 β 5,000 times the bet is created. Money Train series (Relax Gaming) also uses Mystery Symbols, but within the Hold and Win bonus β they are hidden Cash symbols with different effects.
Cash and Money symbols: fixed values ββfor Hold and Win
Cash symbols (or Money symbols) are a special type of symbols that appeared especially with the extension of Hold and Win mechanics after 2026. Unlike regular payment symbols, they have a fixed monetary value indicated directly on the symbol (typically from 1x to 1000 times the bet). In the base game, they act like normal symbols with their own payout, but their main value is revealed when the Hold and Win bonus is triggered.
Principle of Hold and Win with Cash symbols:
- 6+ Cash symbols on the screen will trigger the bonus round.
- All Cash symbols will "lock" in their positions.
- The player gets 3 free spins during which additional Cash symbols can be added.
- Each new Cash symbol resets the counter to 3.
- The bonus ends when the counter reaches 0 or the entire screen is filled.
- The player gets the sum of all the values ββof the Cash symbols on the screen.
The most famous titles with Cash symbols in Ireland licensed casinos:
| Slot | Manufacturer | Trigger Hold and Win | Max. win |
|---|---|---|---|
| Big Bass Bonanza (series) | Pragmatic Play | 6+ Money symbols (fishermen) | 2,100x β 10,000x bet |
| 9 Pots of Gold | Microgaming | 6+ Cash Pots | 2000x bet |
| Hot to Burn Hold and Spin | Pragmatic Play | 5+ Coin symbols | 1,200x stakes |
| Money Train 4 | Relax Gaming | 3+ Bonus (Scatter) symbols | 150,000x bet |
| Hold and Spin (Apollo Games) | Apollo Games | 5+ Star/Cash symbols | 1000x bets |
A detailed analysis of Hold and Win mechanics with specific hit rates and payouts is described in a separate article slots with locked symbols .
Jackpot symbols: Mini, Minor, Major, Grand
Jackpot symbols are a subtype of Cash symbols with a fixed tiered value. In the Hold and Win bonus, they behave the same as regular Cash symbols, but their value is "fixed and typically high". Standard scaling (most often with Pragmatic Play, Microgaming):
| Jackpot tier | Typical value | Hit frequency | Example for a β¬1 bet |
|---|---|---|---|
| Mini | 10x β 25x bets | 1 to 3 β 5 bonuses | 250 β β¬20 |
| Minor | 50x β 100x the stake | 1 to 8 β 15 bonuses | 1,250 β β¬ |
| Major | 200x β 500x the stake | 1 to 50 β 100 bonuses | 5,000 β β¬1 |
| Grand | 1000x β 10000x the stake (or progressive) | 1 in 1,000 β 10,000 bonuses | 25,000 β β¬10 |
In some slots, the Grand Jackpot is progressive β it grows with each bet until the player wins it. This is the principle of jackpot slots, which the article describes in detail casino jackpot vs. Progressive jackpot .
Paylines, Ways to Win, Cluster Pays and Megaways
The way in which a win is evaluated differs fundamentally between slots. The four main mechanics that cover 95% of online slots today:
1. Classic winning lines (paylines)
Fixed routes over 3 β 5 cylinders. Typically 10, 20, 25, 30 or 50 lines. A win is made if there are matching symbols in a row (typically 3+ in a row from the left) on a given line. Some slots are rated both ways (left and right β Starburst). Examples: Book of Ra (10 lines), Cleopatra (20 lines), Wolf Gold (25 lines), Da Vinci Diamonds (20 lines).
2. Ways to Win (243, 720, 1,024, 4,096, ...)
A win is made if the same symbols are in a row from left to right on adjacent reels β regardless of position within the reel. For a 5-reel slot with 3 positions on each, that's 3 Γ 3 Γ 3 Γ 3 Γ 3= 243 ways to win. Buffalo (Aristocrat) has 1,024 ways. These slots pay out more often than classic paylines, but the average win is lower.
3. Cluster Pays/Pay Anywhere
A win falls if there is a group of identical symbols touching horizontally or vertically (5+ pieces). Sweet Bonanza (Pragmatic Play) awards a win if 8+ of the same symbols are anywhere on the 6Γ5 screen. Reactoonz (Play'n GO) scores a cluster of 5+ symbols. Cluster Pays are typically combined with tumbling reels β after a win, the symbols disappear and new ones fall in their place.
4. Megaways
Special mechanics, where the number of symbols on the reel changes with each spin β from 2 to 7. With the maximum number of symbols on the reel, up to 117,649 ways of winning are possible. See the article for details Megaways slots .
The effect of mechanics on the hit rate of symbols
| Mechanics | Hit rate of any wins | Hit rate Wild matches | Typical volatility |
|---|---|---|---|
| Paylines (10 β 25 lines) | 25 β 35% | once every 20 β 30 spins | Low to medium |
| Paylines (40 β 50 lines) | 30 β 40% | once every 15 β 25 spins | Medium |
| Ways to Win (243 β 1,024) | 30 β 45% | once every 12 β 20 spins | Medium |
| Cluster Pays | 20 β 30% (often cascading) | once every 18 β 28 spins | High |
| Megaways | 18 β 25% | once every 10 β 18 spins | Very high |
Hit rate β statistical reality of symbols
Many players have a false intuition about how often a Wild, Scatter or Bonus lands. The reality is given by the RTP, volatility and number of "stops" on each reel. Below are the specific numbers for statistically average 5-reel slots:
| Symbol/event | Average hit rate | 100 spins | 1000 spins |
|---|---|---|---|
| Any cash prize | 25 β 35% | 25 β 35 wins | 250 β 350 wins |
| Wild on the screen | once every 8 β 15 spins | 7 β 12 Wilds | 70 β 120 Wilds |
| Wild as part of the win | once every 20 β 35 spins | 3 β 5 wins with the Wild | 30 β 50 wins with Wild |
| 1 Scatter on the screen | once every 4 β 8 spins | 12 β 25 Scatters | 125 β 250 Scatters |
| 2 Scatters (often) | once every 25 β 40 spins | 2 β 4 pairs | 25 β 40 pairs |
| 3+ Scatters (bonus trigger) | once every 150 β 350 spins | less than 1 bonus | 3 β 7 bonuses |
| Big win (50x β 200x stake) | once every 400 β 800 spins | extremely rarely | 1 β 3 big wins |
| Mega win (1000x and more) | once every 5,000 β 50,000 spins | practically never | typically 0 β 1 |
Beware of the bad luck illusion: At 1,000 spins, the player has a 50% chance of not experiencing a win greater than 500x the bet. With 100 spins, the probability of the bonus falling is only about 40% (with a hit rate of 1 in 200). A slot that hasn't paid out a bonus after 250 spins isn't "broken" β it's within the mathematical norm. RNG has no memory: the probability of the bonus falling in the 251st Spin is the same as in the 1st Spin. He dissects the detail slot machine myths article .
Symbols for individual game manufacturers
Each slot manufacturer has its own "signature" mechanic that repeats itself across the entire portfolio. It is useful for Ireland players to know what to expect from a given studio before the first spin.
| Manufacturer | Distinctive symbols and mechanics | A typical Ireland portfolio |
|---|---|---|
| Pragmatic Play | Tumbling reels + Multiplier (Sweet Bonanza, Gates of Olympus), Money symbols (Big Bass series), Stacked Wild (Wolf Gold), Bonus Buy | A wide portfolio in licensed Ireland casinos |
| NetEnt | Walking Wild (Jack and the Beanstalk), Avalanche Multiplier (Gonzoβs Quest), Random Wild Re-Spin (Starburst), Mega Fortune jackpot | Selected titles via Evolution Gaming |
| Play'n GO | Expanding Wild (Book of Dead), Mystery Symbol (Reactoonz), Hold and Win (Rise of Olympus 100) | Selected titles, especially the Book series |
| Push Gaming | Mystery Stacks (Razor Shark, Razor Returns), Wild Tumbling (Jammin' Jars), unlimited multiplier | Limited portfolio in Ireland casinos |
| Relax Gaming | Money Train series (Hold and Win + Cash symbols with features), Dream Drop jackpots | Money Train titles via selected operators |
| Microgaming | 9 Pots of Gold (Hold and Win), Immortal Romance (4 bonus features), Mega Moolah jackpot | A wide portfolio |
| Novomatic | Classic Wild + Expanding Wild (Book of Ra), simple structure of paylines | Bestsellers Book of Ra, Lucky Ladyβs Charm |
| Apollo Games | Classic Wild + Scatter, Hold and Spin local titles, 3 β 5 reels with 10 β 25 lines | Local portfolio available in Ireland casinos |
| Cabin Win | Classic 3-reel and 5-reel slots with simple symbols (fruits, numbers, classic theme) | Local production, simple mechanics |
| EGT (Euro Games Technology) | Jackpot Cards (4 level jackpot on any game), Classic Wild + Scatter | Classic portfolio with jackpots |
For a complete overview of individual studies and their portfolios, see the article online casino game providers . Article for local production Apollo Games slot machines .
Practical examples of winning calculation
Example 1: Win with Wild and Multiplier
Model situation: you are playing a slot with 5 reels, 25 paylines. Bet β¬1 per spin.
Landed: A, A, Wild Γ2, K, A on the first line (from left to right).
Rating:
- Wild replaces the missing symbol β interpreted as A.
- So on the first line you have 3 A symbols in a row (A, A, Wild= A) and then a K symbol, which is different β the hand stops at 3 A in a row.
- Win for 3 A symbols according to the paytable: 5x bets= β¬5.
- Wild Γ2 multiplier: winnings are multiplied by 2 times= β¬10.
Final result: the player won from the first line β¬ 10. If other winning lines are also active, all winnings are added together. For example, a 5th line with a lower win of β¬ 2 can be activated during the same spin β a total win of β¬ 10 from one spin.
Example 2: Scatter triggers Free Spins + Sticky Wild
Model situation: you are playing Sticky Bandits, bet β¬ per spin. In the base game, 3 Scatters have fallen, which activates 8 free spins.
- In the 1st Free Spin, the Sticky Wild falls on position (3, 2). The Wild will remain in this position until the end of the bonus.
- In the 3rd Free Spin, the second Sticky Wild falls at position (4, 3). Both Wilds remain.
- In the 5th Free Spin, the third Sticky Wild + winning combination: A, K, Wild, Wild, A falls.
- Wild substitutes for a K in the 3rd position and a K in the 4th position β 3 K in a row with another K in the 5th position. Hmm, but on 5. There's an A, so the hand stops. K, K, K, K combination is evaluated (Wildy completes K)= 4 K in a row= 15x bet= β¬6.
- In the 7th Free Spin, the winning combination A, A, A falls on the 1st, 2nd, 3rd Reels= 5x bets= β¬2.
Final bonus result: β¬6 + β¬2= β¬8. At 8 spins with an average win of β¬1 per spin (typical standard), this is fully within expectations for a moderately volatile Sticky Wild bonus.
Example 3: Multiplier Bombs in Free Spins (Sweet Bonanza)
Model situation: you are in Sweet Bonanza free spins (where only multiplier bombs fall), bet β¬1 per spin. Win 8 matching red hearts= 10x bet= β¬10. Cascade starts β hearts disappear, new symbols fall.
- 2. Cascade: 8 blue candies= 5x bets= β¬5.
- 3. Cascade: a multiplier symbol with a value of Γ6 + 9 green candies= 4x bets= β¬4.
- 4. Cascade: 10 purple sweets= 8x bets= β¬8.
- Cascades end, multiplier Γ6 is applied to the sum of all winnings: (250 + 125 + 100 + 200) Γ 6= 675 Γ 6= β¬.
Important clarification: multiplier bombs in Sweet Bonanza fall ONLY in free spins β there are no multipliers in the base game. In free spins, at the end of each cascading series, the values ββof all visible bombs (Γ2 β Γ100) are added up and applied to the total winnings of the series. It is this mechanic that is responsible for most of the maximum winnings of the slot, but its exact share of the RTP is not disclosed by the manufacturer.
Example 4: Hold and Win bonus (Big Bass Bonanza)
Model situation: you are playing Big Bass Bonanza, bet β¬ 1. 4 Scatters have fallen, the Free Spins bonus with 10 spins is activated.
- In the 2nd Spin, 1 Money symbol lands (a fisherman with a value of 4x the bet) + Wild= the fisherman collects himself= 4 Γ β¬ 1= β¬ 2.
- In the 5th Spin, 3 Money symbols land (2x, 3x, 10x bets) + Wild collects= (2 + 3 + 10) Γ β¬ 1= β¬ 8.
- In the 8th Spin, Wild + 2 Money symbols (5x and 20x bets)= (5 + 20) Γ β¬1= β¬10.
Final bonus result: β¬2 + β¬8 + β¬10= β¬20. That's 44x the bet β a solid result for a Big Bass bonus (the average is 30 β 80x the bet).
The effect of symbols on the slot's RTP and volatility
Special symbols and bonus features make up a substantial part of the slot's RTP (often the majority for high-variance titles). RTP is a long-term average payout that consists of three main parts:
- Regular payouts from the base game (30 β 50%): small wins in classic combinations.
- Bonus features (free spins, mini-games, 30 β 50%): most RTP in modern slots.
- Special mechanics (multipliers, Sticky, Mystery, 5 β 20%): form peak payouts in individual rounds.
A slot that has a lot of special symbols usually has a higher variability β most of the spins are "empty", but sometimes a mega win comes from the bonus. A slot with minimal special features has low variability β regular wins fall more often, but are smaller.
RTP distribution by symbol type
The specific proportion of each source of a win varies across slots, but a typical breakdown for 5-reel titles with 96% RTP is:
| Source of winnings | Classic slot | High-variance slot | Hold and Win slot |
|---|---|---|---|
| Low-pay symbols in the base game | 25 β 30% | 10 β 15% | 15 β 20% |
| Mid-pay + high-pay in the base game | 30 β 35% | 15 β 20% | 20 β 25% |
| Wild + Stacked Wild | 5 β 10% | 5 β 10% | 5 β 8% |
| Free spins (Scatter trigger) | 20 β 25% | 35 β 45% | 10 β 15% |
| Multiplier + Mystery | 5 β 10% | 15 β 25% | 2 β 5% |
| Hold and Win + Cash symbols | 0% | 0% | 30 β 40% |
| Total (β RTP) | 96% | 96% | 96% |
Understanding this distribution has practical value for realistic expectations: in a high-variance slot, most of the long-term return is concentrated in rare bonuses (Scatter triggers, multiplier-driven free spins, Hold and Win), not in the base game. Importantly, RTP is a long-term statistical average over millions of spins β it does not mean that the "missing" value must come within a single session. The RNG is memoryless and each spin is independent. Therefore, treat the slot as entertainment with an expected loss, not as a way to "get" the rest of the RTP.
For a comparison of specific slots and their RTP/variability, see the articles real RTP Ireland slots and Apollo Games slot machines . For the mechanics of randomness, the article itself RNG and audits of online slots .
The most common mistakes in the interpretation of symbols
From the real practice of slot testing in Ireland licensed casinos, we see the same mistakes in novice players. The six most common:
- "Wild must always pay." Wild only pays as part of a combination. Wild lands on the screen once every 10 β 15 spins, but as a winning combination once every 25 β 35 spins. Falling Wild without a match= zero win.
- "After a long streak without a win, a bonus must fall." The classic gambler's fallacy. RNG has no memory β the probability of the bonus falling in the 500th Spin is exactly the same as in the 1st Spin. Detail in article about slot machine myths .
- "A higher bet will increase the chance of a bonus." No. The bet only determines the size of the win, not the probability. At β¬2, β¬2 and β¬10 the Scatter hit rate is identical.
- "To win big you need to play the maximum bet." Not for most slots. Max bet is only relevant for progressive jackpots with a minimum qualifying bet (Mega Moolah, Wheel of Wishes). Regular slots pay out linearly according to the bet.
- "Wild x5 is always better than Wild x2." Not necessarily. Wild Γ5 is rarer (typically once every 80-150 spins) than Wild Γ2 (once every 30-50 spins). At 200 spins, the player will experience Wild Γ2 typically 4 β 6 times, Wild Γ5 maybe only once.
- "Mystery symbol is always the best combination." The Mystery symbol turns into a random symbol β it can be a low J or a 10. If there are 6 Mystery symbols and it turns into a J, the win is only 5 β 10x the bet. Mystery is a big source of winnings only when it turns into a high-paying symbol.
How to read the symbols before the first spin
Before you press "Spin", spend 30 seconds in the paytable. Five-step procedure:
- Open the paytable via the "i" or "Rules" icon in the game client. The paytable shows the value of each symbol on 3, 4 and 5 matches.
- Identify special symbols (Wild, Scatter, Bonus, Cash). In the paytable, they are usually at the beginning or end with a special icon and a note about their function.
- Check the Wild substitution rules. Typically, the Wild replaces all symbols except the Scatter and the Bonus symbol, but some slots have exceptions (the Wild does not replace the highest symbol or the Wild only falls on the middle reels).
- See Scatter and Bonus rules. How many Scatters trigger the bonus, how many free spins you get, what rules apply in free spins (multipliers, sticky Wilds, re-trigger).
- Verify RTP variants. Check the current RTP variant in the "Rules" of the game. Pragmatic Play and some other manufacturers certify the same game with more RTP (94, 95, 96%). The operator chooses the variant during integration. Details in the article real RTP Ireland slots .
A dictionary of symbolic terms
A quick reference of the most important terms you will encounter in slot descriptions:
| Concept | Importance |
|---|---|
| Wild | A symbol that replaces paying symbols on a payline (except Scatter/Bonus). |
| Scatter | A symbol rated regardless of line, most often triggers a bonus or free spins. |
| Bonus symbol | A symbol that triggers an interactive bonus game (mini-game, wheel, pick-and-click). |
| Multiplier/Multiplier | The factor by which the win is multiplied (Γ2, Γ3, Γ100). |
| Sticky Wild | A Wild that stays in position through several spins. |
| Expanding Wild | Wild, which expands to the entire reel when landed. |
| Walking Wild | Wild, which moves one reel after each spin. |
| Stacked Symbol | A symbol that falls in a stack β covers the entire reel at once. |
| Mystery Symbol | A symbol that turns into a specific other symbol after a spin (all the same). |
| Cash/Money Symbol | A symbol with a fixed cash value, key to the Hold and Win bonus. |
| Jackpot symbol (Mini/Minor/Major/Grand) | Fixed jackpot cash symbol β from 10x to 10,000x bet or progressive. |
| Low-pay/High-pay symbol | Payment tier β low (cards), medium (theme), high (premium theme). |
| Payline | A fixed route across the reels on which winning combinations are scored. |
| Ways to Win | Mechanics evaluating the win regardless of position on the reel (243, 1,024, 4,096). |
| Cluster Pays | Mechanics evaluating groups of identical symbols that touch. |
| Tumbling/Cascading reels | Mechanics where symbols disappear after a win and new ones fall in their place. |
| Hit rate | The probability of landing a specific win or event (once per N spins). |
| Paytable | An overview of the values ββof the symbols in the game, their combinations and the rules. |
| RTP (Return to Player) | Theoretical return on bets in the long term (typically 94 β 96%). |
| Volatility | Frequency and size of wins (low= frequent small, high= rare large). |
For a broader dictionary of casino terms, see the article online casino glossary .
Resources and further reading
Related Articles β Game Math and Mechanics:
- RTP and volatility of slots
- The volatility of semi-healing machines
- Real RTP Ireland slots
- How to read a slot machine paytable
- Megaways slots β 117,649 paylines
- Slots with locked symbols (Hold and Win)
- RNG and independent audits of online slots
- Myths about slot machines
Related Articles β Bonuses and Strategies:
- Free spins β a complete guide
- Buying a bonus in machines (bonus buy)
- Which games pay for bonus spins
- Casino jackpot vs. Progressive jackpot
Related Articles β Manufacturers and Titles:
- Online casino game providers
- Apollo Games Slots
- Slot machines online β the complete guide
- Glossary of online casino terms
- Aviator and crash games β an alternative to slots
External professional and regulatory resources:
- Pragmatic Play β Sweet Bonanza official site (multiplier bomb mechanics and RTP)
- Pragmatic Play β Gates of Olympus (orby multiplier Γ2 β Γ500)
- NetEnt β Starburst (Expanding Wild and Re-Spin, win-both-ways)
- ELK Studios β Wild Toro (Walking Wild with Progressive Multiplier)
- Relax Gaming β Money Train 4 (Hold & Win, max win 150,000Γ)
- Gambling regulator
β Frequently asked questions about slot symbols
RTP and volatility Megaways Hold and Win Pay table Glossary of terms
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