5-Reel Irish Slot by Scientific Games with 95.17% RTP and Free Spins Feature
Rainbow Riches Free Spins is a 5-reel, 10-payline slot game developed by Barcrest and published by Scientific Games through SG Interactive. Released in 2016, this Irish folklore-themed slot features a vibrant purple gradient sky with rainbow arcs, silhouetted trees, and the iconic pot of gold motif. The game operates on a standard 5x3 reel configuration with 15 visible symbol positions, all framed within an ornate golden Celtic-style border.
The slot features 10 fixed paylines that remain active at all stake levels. Players can wager from a minimum of 0.10 to a maximum of 500.00, with a default stake set at 2.00. The game offers a theoretical Return to Player of 95.17%, calculated over millions of spins. The maximum win potential stands at 250,000.00 per game, though this maximum may not be achievable from all stake levels.
Rainbow Riches Free Spins is built around its signature Free Spins feature, triggered by landing 3 Bonus symbols on reels 1, 3, and 5. The feature offers players a choice between three different configurations: 10 free spins with 3 stacked bonus symbols, 15 free spins with 5 bonus symbols, or 20 free spins with 6 bonus symbols. The game employs an alternative reel set during free spins and allows for retriggering up to a maximum of 999 total spins.
The highest value symbol in the game, featuring the game logo with rainbow-colored text displayed on a green background. This premium symbol delivers the most substantial payouts.
Medium value symbol rendered in red with decorative font styling. The Ace represents one of the higher-paying card symbols in the paytable hierarchy.
Medium value symbol displayed in blue with decorative font. The King symbol sits in the mid-tier of the paytable, offering solid returns for matching combinations.
Low value symbol featuring green decorative font. Part of the standard playing card symbol set that makes up the lower-paying symbols.
Low value symbol shown in golden yellow with decorative font styling. Contributes to the Irish theme with its warm color palette.
Low value symbol rendered in purple decorative font. The lowest-value regular symbol, but still contributes to winning combinations across the paylines.
Special substitution symbol featuring a Leprechaun character wearing a distinctive green hat. This symbol can appear on any reel position during base game play.
The Wild substitutes for all regular symbols to help create winning combinations. However, it does not substitute for the Bonus Free Spins symbol. The Wild plays a crucial role in completing paylines and maximizing win potential.
The game's scatter symbol, displayed as a circular badge with FREE SPINS text prominently featured. This special symbol only appears on reels 1, 3, and 5.
Landing 3 Bonus symbols simultaneously on reels 1, 3, and 5 triggers the Free Spins feature. During the Free Spins feature, these Bonus symbols also function as Wild symbols, providing additional substitution power and increasing win opportunities.
The Free Spins feature is activated when 3 Bonus symbols land simultaneously on reels 1, 3, and 5 during a base game spin. These are the only reels where Bonus symbols can appear, creating a specific trigger pattern that players must achieve.
Once triggered, the game transitions to a selection screen where players make a strategic choice about their free spins configuration. This selection screen displays the title Rainbow Riches Free Spins with a subtitle and the instruction: BONUS SYMBOL ON REELS 1, 3 AND 5 INITIATES THE FREE SPIN BONUS.
Players are presented with three distinct free spins configurations to choose from:
Each option represents a trade-off between quantity of spins and the density of bonus symbols that will appear during the feature. Players confirm their selection using the green checkmark button positioned at the bottom center of the selection screen.
One of the most powerful aspects of the Free Spins feature is the stacked symbols mechanic. During free spins, Bonus symbols can stack on reel 1, meaning multiple Bonus symbols can occupy all three positions on that single reel simultaneously.
Since Bonus symbols act as Wild symbols during the Free Spins feature, having them stacked on reel 1 creates exceptional win potential. A fully stacked reel 1 with three Bonus/Wild symbols can contribute to multiple winning combinations across different paylines in a single spin.
The stacking mechanism significantly enhances the feature's volatility and win potential, as it effectively creates three Wild positions on the leftmost reel where winning combinations begin.
The Free Spins feature operates using an alternative reel set distinct from the base game reels. This special reel configuration contains a different symbol distribution optimized specifically for the free spins gameplay experience.
The alternative reel set is designed to work in conjunction with the stacked Bonus symbols on reel 1 and the Wild functionality of Bonus symbols. This creates a unique mathematical model for the feature that differs from regular base game spins.
Players will notice different symbol frequencies and patterns during free spins compared to base game, all calibrated to deliver the feature's intended win potential and player experience.
The Free Spins feature includes a powerful retrigger mechanism. If players land 3 Bonus symbols on reels 1, 3, and 5 during active free spins, additional free spins are awarded.
These extra spins are added directly to the remaining spin count, extending the feature. The retrigger follows the same selection process as the initial trigger, allowing players to choose their preferred configuration again.
There is no limit to the number of times the feature can retrigger, but the cumulative total of free spins is capped at a maximum of 999 spins. This creates the potential for extended feature sessions with substantial accumulated wins.
The Free Spins feature terminates under two conditions:
Upon termination, all accumulated winnings from the entire feature session are added to the player's balance. The bet level throughout the entire feature remains identical to the stake that triggered the initial free spins.
A crucial mechanic of the Free Spins feature is that Bonus symbols transform into Wild symbols for the duration of the feature. This means they substitute for all regular paying symbols to create winning combinations.
This dual functionality makes Bonus symbols the most valuable symbols during free spins. They not only appear stacked on reel 1 but can also land on other reels, where they act as Wilds to complete or enhance winning combinations.
The combination of stacked positioning and Wild substitution power makes the Bonus symbols during free spins significantly more powerful than the standard Wild symbol available in base game.
Rainbow Riches Free Spins features 10 fixed paylines that are always active at all stake levels. Each payline follows a specific pattern across the 5x3 reel grid, running from left to right. Wins must start from the leftmost reel and continue consecutively.
Middle row straight across - the most straightforward payline running horizontally through the center positions of all five reels.
Top row straight across - horizontal line running through the top positions of all five reels.
Bottom row straight across - horizontal line running through the bottom positions of all five reels.
V-shape down - starts at top of reel 1, descends through middle of reel 2 to bottom of reel 3, then rises back through middle of reel 4 to top of reel 5.
Inverted V-shape up - starts at bottom of reel 1, rises through middle of reel 2 to top of reel 3, then descends through middle of reel 4 to bottom of reel 5.
Zigzag starting middle - begins at middle of reel 1, moves to top of reel 2, returns to middle of reel 3, drops to bottom of reel 4, returns to middle of reel 5.
Zigzag starting top - alternates between top and bottom positions across the five reels in a distinctive zigzag pattern.
Wave pattern - creates a wave-like formation moving through middle, bottom, and top positions across the reel set.
M-shape - forms the letter M shape across the reel grid with rises and falls creating the distinctive pattern.
W-shape - creates a W formation across the five reels with alternating positions forming the pattern.
The game includes a comprehensive payline visualization system accessible through the information screens. Paylines are displayed on a golden grid representing the 5x3 reel positions.
Active positions for each payline are marked with red squares, while inactive positions are shown with black squares. This color-coding system makes it easy for players to understand exactly which symbol positions contribute to each of the 10 paylines.
The visualization system is particularly helpful for new players learning the game's mechanics and for experienced players verifying winning combinations.
Rainbow Riches Free Spins employs a standard left-to-right win evaluation system with specific rules governing how wins are calculated and paid:
Winning symbols must appear on an active payline starting from the leftmost reel (reel 1) and continue consecutively to the right. A gap in the sequence breaks the winning combination. For example, matching symbols on reels 1, 2, and 4 do not constitute a win, as reel 3 breaks the consecutive sequence.
When multiple winning combinations of the same symbol appear on a single payline, only the highest value win is paid. For instance, if a payline contains both a 3-of-a-kind and a 5-of-a-kind combination of the same symbol, only the 5-of-a-kind payout is awarded.
Wins occurring on different paylines are independent of each other and are all paid. The total win is calculated by adding together the highest win from each individual payline. This means a single spin can produce multiple simultaneous wins across different paylines.
After reels stop, winning combinations are highlighted sequentially. Each winning payline is displayed in turn with animated highlighting of the contributing symbols. The Total Win counter accumulates the value from each payline, updating continuously until all wins have been displayed.
The game provides a flexible staking system allowing players to customize their bet level within defined parameters:
Minimum total stake is set at 0.10, maximum at 500.00, with the default stake at 2.00. These values represent the total bet per spin across all 10 paylines.
Since the game features 10 fixed paylines that are always active, the stake per line is automatically calculated by dividing the total stake by 10. For example, a total stake of 2.00 results in 0.20 per payline.
Players modify their stake using two triangle-shaped buttons positioned between the stake display panels. The red downward-pointing triangle decreases the stake in preset increments. The green upward-pointing triangle increases the stake through the same increment steps.
Two dedicated display panels show stake information. The STAKE display shows the total bet per spin. The STAKE/LINE display shows the calculated per-payline stake. Both displays feature yellow text on black backgrounds for optimal visibility and clarity.
The Autoplay feature enables automated gameplay with extensive customization options to suit different playing styles and bankroll management strategies:
Players choose from four preset spin count options: 5 spins for quick automated sessions, 25 spins for moderate automation, 50 spins for extended automated play, or 100 spins for maximum automation. The selected count decrements with each spin until reaching zero.
Four loss limit thresholds are available: 10.00, 50.00, 100.00, or 200.00. When the cumulative losses from the autoplay session reach the selected threshold, the autoplay sequence immediately terminates, protecting the player's bankroll from excessive depletion.
Players can set single win limits at 10.00, 20.00, 40.00, or select NEVER to disable this feature. When a single spin produces a win equal to or exceeding the selected limit, autoplay stops, allowing the player to evaluate their position and decide whether to continue.
The autoplay interface features two primary control buttons. A red CANCEL button with white text immediately stops autoplay and returns control to manual play. A gray START button with white text initiates the automated sequence with the selected parameters.
Autoplay is accessed via the circular refresh arrows button on the right control panel, distinguished by its green square backing and golden frame. Clicking this button opens the autoplay configuration screen where all parameters can be set before activation.
The Gamble feature represents an optional risk-based game that becomes available following winning spins:
The Gamble feature button only becomes active after a winning spin completes and the win is displayed in the Total Win counter. During spins without wins or during free spins, the button remains inactive.
The Gamble button displays a playing card back design as its primary icon, with a small bottle graphic positioned at the bottom. The button is framed in red with a golden ornate border, making it visually distinct from other control panel elements.
When activated, players have the opportunity to risk their current win amount in an attempt to increase it. The specific gamble mechanics follow standard industry patterns, though players should note that gambling a win puts the entire amount at risk.
Players must decide whether the potential reward justifies the risk of losing their accumulated win. The feature is entirely optional, and players can simply collect their wins by continuing regular play without engaging the gamble option.
The game maintains clear, continuous display of financial information through dedicated interface elements:
Located in the bottom left corner of the interface, the Balance display shows the player's current credit balance. Formatted with yellow text on a black background, it uses numeric display with two decimal places for precision. The balance updates immediately after each spin completes, reflecting stake deduction and any wins added.
Positioned in the bottom right corner, the Total Win display shows accumulated winnings from the current game round. Also formatted with yellow text on black background with two decimal places. During base game, it shows individual spin wins. During free spins, it accumulates all wins from the entire feature session. The counter resets to zero at the start of each new game round.
Throughout the Free Spins feature, the Total Win counter continuously accumulates winnings from each individual free spin. This running total provides players with real-time information about their feature performance. The accumulated total is added to the player's balance only when the feature terminates.
The game employs two distinct reel configurations, each optimized for its specific gameplay context:
The standard reel set used during regular gameplay features a specific symbol distribution designed for base game mathematics. This configuration creates the game's core volatility profile and establishes the foundation for the 95.17% RTP calculation.
When the Free Spins feature activates, the game switches to an alternative reel configuration. This special reel set contains different symbol frequencies optimized specifically for free spins gameplay. The distribution is designed to work in conjunction with stacked Bonus symbols and their Wild functionality.
Players will observe different patterns of symbol appearances during free spins compared to base game. High-value symbols may appear more frequently, and the overall hit frequency of winning combinations typically increases during the feature.
Despite using different reel sets, both the base game and free spins contribute to the overall 95.17% RTP. The mathematical models for each are calibrated to work together in creating the game's complete return profile.
The central 5x3 reel grid is surrounded by a golden ornate Celtic-style frame that reinforces the Irish theme. Behind the symbols, a gray gradient background provides contrast for optimal symbol visibility.
Subtle vertical lines serve as reel dividers, helping players track symbol positions across the grid. During spins, reels display a blurred vertical motion effect for smooth animation.
The left panel houses stake management and game information controls. The STAKE display shows total bet, while STAKE/LINE shows per-payline stake. Both use yellow text on black backgrounds.
Red and green triangle buttons adjust stakes. A blue circle with 'i' provides information access. A gear icon opens settings. The LINES display shows the fixed count of 10 paylines.
The primary action controls occupy the right panel. The large green play arrow spin button, framed in golden ornate border, initiates single spins.
Circular refresh arrows in a green square access autoplay. The playing card design button with bottle graphic and red frame activates the gamble feature. A blue 'i' button provides alternative information access.
The bottom bar provides continuous financial tracking. Balance appears in the left corner showing current credits. Total Win displays in the right corner showing accumulated winnings.
The center features the Barcrest logo in blue text within an oval frame. All text uses high-contrast yellow on black for optimal readability.
The initial loading screen displays the Rainbow Riches Free Spins title in large golden letters with red outline against a purple sky featuring a prominent rainbow.
A blue progress bar in a black container at bottom center tracks loading progress. Branding includes the Powered by SG Interactive logo in the bottom left and Barcrest logo in blue oval in the bottom right.
When free spins trigger, a dedicated selection screen appears. It displays the title and subtitle, along with instruction text explaining the trigger.
Three configuration options are shown with visual representations of bonus symbol arrangements. A green checkmark button at bottom center confirms the player's selection.
Accessible via blue 'i' buttons, information screens provide comprehensive game details. These screens display the paytable with symbol values, explain game rules, and illustrate payline configurations.
The payline visualization uses a golden 5x3 grid with red squares marking active positions and black squares marking inactive positions for each payline pattern.
The settings menu, accessed via the gear icon, allows players to customize their experience. Options include sound adjustments, graphics quality settings, and other gameplay preferences.
The interface maintains the same visual style as the main game, with clear labeling and intuitive controls for all adjustable parameters.
Rainbow Riches Free Spins operates in strict accordance with fair gaming practices established by regulatory authorities:
The game features a theoretical Return to Player of 95.17%. This represents the expected percentage of total stakes returned to players calculated over millions of spins.
The RTP is a theoretical value derived from mathematical probability. Individual playing sessions will experience variance and may differ significantly from this long-term expectation. Short-term results can vary widely above or below the theoretical RTP.
The 95.17% RTP encompasses both base game and Free Spins feature play, representing the combined return across all game states and features.
The maximum win per game is capped at 250,000.00. This limit represents the highest possible payout from a single game round, including all wins accumulated during base game and Free Spins feature.
It is important to note that this maximum may not be reachable from all stake levels. The relationship between stake size and maximum achievable win is governed by the game's mathematical model and maximum multiplier potential.
Players should be aware that reaching the maximum win requires specific combinations of high-value symbols across multiple paylines, most commonly achievable during extended Free Spins feature sessions with optimal symbol alignment.
In accordance with industry-standard practice, malfunction voids all pays and plays. This policy protects both players and operators from technical errors.
A malfunction is defined as any technical error, software bug, display error, or system failure that affects game operation or outcome determination. This includes but is not limited to incorrect symbol displays, calculation errors, or communication failures.
In the event of a suspected malfunction, players should immediately cease play and contact customer support. The casino operator will investigate the issue and resolve it according to established procedures and regulatory requirements.
Game logs and Random Number Generator data provide an audit trail for investigating any disputed outcomes or suspected malfunctions.
The game's total stake is divided equally across 10 fixed paylines, with each payline receiving one-tenth of the total stake. This creates a direct relationship between total stake and per-line stake.
All symbol payouts are expressed as multipliers of the per-line stake, not total stake. For example, a 500x payout multiplies the stake on that specific payline, not the total stake across all lines.
The maximum win of 250,000.00 may not be achievable at lower stake levels due to the mathematical relationship between stake size and maximum multiplier potential. Players seeking the absolute maximum win potential should play at higher stake levels.
The Free Spins feature follows specific rules governing its operation:
The game's visual design draws heavily from Irish mythology and folklore, centered around the iconic rainbow and pot of gold motif. This theme is consistently expressed throughout all visual elements, from symbols to background design to interface decoration.
The Celtic cultural influence is evident in the ornate golden frame surrounding the reels, which features intricate patterns reminiscent of traditional Celtic art. This framing device not only enhances the thematic consistency but also provides a clear visual boundary for the playing area.
The primary color palette centers on purple and gold, creating a rich, premium aesthetic that suggests value and prosperity. Purple gradient skies transition smoothly from lighter to darker tones, adding depth to the background.
Secondary colors incorporate the full rainbow spectrum, reinforcing the rainbow theme central to the game's identity. Green accents throughout the interface connect to the Irish theme, appearing in button designs and symbol coloring.
The color scheme maintains high contrast throughout, ensuring readability and symbol distinction while preserving the cohesive visual theme.
The background features a purple to pink gradient sky creating atmospheric depth. Multiple rainbow arcs are layered to produce a three-dimensional effect, with arcs appearing at different depths in the composition.
Silhouetted trees appear at the bottom of the screen, grounding the composition and adding a sense of landscape. These dark silhouettes contrast with the bright sky, creating clear visual separation between foreground and background elements.
The layered composition guides the eye toward the central reel area while maintaining visual interest across the entire screen space.
Symbols are designed with clear visual distinction from one another. Each playing card symbol features decorative fonts in unique colors: blue King, red Ace, green Queen, golden yellow Jack, and purple 10.
The Rainbow Riches Logo symbol uses rainbow-colored text on a green background, making it immediately identifiable as the highest-value symbol. The Wild symbol features a detailed Leprechaun character with a distinctive green hat, clearly marking its special function.
The Bonus Free Spins symbol uses a circular badge design with prominent FREE SPINS text, ensuring players can instantly recognize this crucial trigger symbol.
During spins, reels display smooth vertical motion with a blurred effect that communicates speed and momentum. The blur effect prevents individual symbols from being clearly visible during motion, building anticipation as reels decelerate.
Winning combinations are highlighted with sequential animation, drawing attention to each winning payline in turn. This sequential presentation helps players understand exactly which symbols contributed to their win and on which paylines.
Symbol animations include highlights and possibly celebratory effects for significant wins, particularly during the Free Spins feature or when landing the highest-value symbol combinations.
The interface layout follows a clear hierarchical structure. The central reel area commands primary attention, with control panels flanking on left and right sides providing secondary focus areas.
Information displays along the bottom maintain persistent visibility without interfering with the main game area. This layout ensures players can monitor their balance and wins while keeping focus on the action.
Button designs use a combination of color coding and iconography. Green indicates primary positive actions like spinning, red indicates stopping or canceling, and blue indicates information access. Golden frames around buttons enhance the premium aesthetic while providing clear button boundaries.
Rainbow Riches Free Spins delivers a focused slot experience built around its signature feature. The 95.17% RTP sits at industry standard levels, while the 10 fixed paylines create straightforward gameplay without overwhelming complexity.
The Free Spins feature with its player choice mechanic and stacked Wild functionality provides the game's primary excitement. The 250,000.00 maximum win potential offers substantial reward possibilities, particularly during extended feature sessions with multiple retriggers.
The Irish folklore theme is executed with consistent visual design and appropriate color palette. Accessibility considerations including color-blind support and motor accessibility features demonstrate thoughtful design.
Scientific Games and Barcrest have created a solid entry in the Rainbow Riches series, emphasizing feature gameplay over base game complexity. The game suits players who enjoy feature-focused slots with clear mechanics and the potential for extended bonus sessions.