Ra vs Osiris is a 5-reel slot released by Pragmatic Play in 2026. It has 96.53% RTP, high volatility, and a maximum win of 25,000x. The game's standout feature is its free spins, triggered by landing three or more scatter symbols, with expanding wilds that can carry multipliers up to 1,000x.
Ra vs Osiris
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Slot Categories & Mechanics
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Volatility & Probability — Ra vs Osiris
Modeled from vendor-confirmed RTP, hit frequency, bonus trigger rate and max win.
Volatility
How volatile is Ra vs Osiris?
SlotsOnFire's model estimates 85% of Ra vs Osiris's spins pay nothing; the vendor math sheet puts its Free Spins at 1 in 205.
- High
- Volatility
- 85%
- Dead spin rate
- 48%
- Feature RTP share
- ~1 in 205
- Feature trigger
- Heavy
- Tail weight
- Dead/micro wins · 85% of spins
- Free Spins · 1 in 205 spins
- Heavy tail · big wins are rare
- Max win state · capped at 25kx
What this means for you
85% of spins return nothing — Ra vs Osiris is genuinely punishing between features.
Features carry 48% of the return — significant, but the base game still contributes.
Budget for variance: expect long dry patches. The wins cluster and are worth waiting for.
RTP 96.53%, max win 25,000x and hit rate 14.8% from the game's published stats · bonus trigger 1 in 205 from the vendor math sheet · payout curve modelled
Effective RTP
Effective RTP for Ra vs Osiris by spin count
Over 100,000 spins, Ra vs Osiris's realised RTP typically lands between 86% and 107% (±1σ, modelled from its 96.53% published RTP).
Expected return stays 96.53%, but realised RTP swings widely over short sessions and only converges with volume. How we model this
| After | Expected RTP | ±1σ swing | Typical range |
|---|---|---|---|
| 5,000 spins | 96.53% | ±46 pp | 50% – 143% |
| 10,000 spins | 96.53% | ±33 pp | 64% – 129% |
| 50,000 spins | 96.53% | ±15 pp | 82% – 111% |
| 100,000 spins | 96.53% | ±10 pp | 86% – 107% |
RTP 96.53%, max win 25,000x and hit rate 14.8% from the game's published stats · per-spin variance modelled
Multiplier ceiling
Confirmed maximum multiplier: 1,000×.
Our Review of Ra vs Osiris
Overview of Ra vs Osiris
Ra vs Osiris by Pragmatic Play immerses players in an epic clash between Egyptian gods, offering a dynamic slot experience with high volatility and a 96.53% RTP. This slot is tailored for thrill-seekers who enjoy high-stakes action and the potential for substantial wins. The unique dual volatility modes allow players to choose between a more balanced or riskier gameplay style, with Osiris mode providing higher average wins at the cost of less frequent bonus rounds.
Core Gameplay Mechanics
The game is set on a 5x5 grid with 15 paylines, offering a straightforward yet engaging gameplay experience. Players can wager between $0.10 to $250 per spin, accommodating both casual players and high rollers. The choice between Ra and Osiris modes not only affects volatility but also changes the game's visual theme, adding a layer of engagement to the decision-making process. The line density ensures significant payouts when winning combinations hit, especially with the potential for large multipliers.
Player fit
Player fit for Ra vs Osiris
Best fit: Max-Win Hunter (high confidence); also Value Seeker, Feature Hunter.
Scores run 0–10 from the game's published stats; 5 or more counts as a fit. How player fit is scored
Feature Breakdown
- Expanding Wilds: Wild symbols expand to cover entire reels and can carry multipliers up to 1,000x, enhancing any winning combination they're part of.
- Free Spins: Triggered by landing 3-5 scatter symbols, this feature starts with six free spins and a minimum multiplier that can be increased through a gamble.
- Walking Wilds: During free spins, expanding wilds transform into walking wilds, moving leftwards with each respin and maintaining their multiplier.
- Buy Feature: Players can directly buy into the free spins feature, with multipliers and bets adjusted according to the chosen mode.
- Gamble Feature: Before the free spins commence, players can gamble to increase the starting wild multiplier, risking all spins for potentially higher rewards.
Graphics and Theme
Ra vs Osiris showcases impressive visuals that highlight the grandeur of ancient Egyptian mythology. The game features vibrant graphics with distinct color schemes for each mode, enhancing the visual experience. The background and symbols are meticulously designed to reflect the theme, immersing players in the mythical battle between Ra and Osiris.
Engineering Techy Notes
Mathematical Breakdown
The RTP for Ra vs Osiris is slightly above average for the industry, with 96.53% in Ra mode and 96.54% in Osiris mode, offering a fair return to players. The base game hit frequency is 1 in 6.76 spins, while feature triggers occur approximately every 205 spins, indicating long stretches between major payouts. The free spins feature contributes significantly to the game's RTP, especially with the potential for retriggers and increasing multipliers.
Variance Analysis
The high volatility is driven by the game's top-heavy paytable, particularly the expanding wilds with multipliers up to 1,000x. This setup can lead to significant swings in bankroll, as the maximum win frequency is extremely low at 1 in 7,250,580 spins. The dual volatility modes further influence the variance, with Osiris mode offering a more pronounced risk-reward profile.
Line Density Evaluation
The 15-line setup in a 5x5 grid means that winning combinations are less frequent but potentially more rewarding, especially when wild multipliers are involved. This structure is ideal for players seeking substantial single-line payouts rather than consistent small wins.
Hit Frequency Implications
With a hit frequency of 14.8% in the base game, players can expect occasional wins, but significant returns are likely tied to the bonus features. The effective hit rate for payouts exceeding the total bet is lower, emphasizing the importance of feature triggers for profitability.
Bankroll Recommendations
Given the high volatility and infrequent feature triggers, a starting bankroll of at least 250 bet units is recommended to mitigate the risk of extended losing streaks. Players should prepare for potential dry spells and aim for substantial returns during bonus rounds.
EV Considerations
The bonus buy feature offers a close approximation to the game's natural RTP, but the high buy-in cost necessitates a substantial bankroll to sustain repeated purchases. Players should weigh the immediate access to features against the long-term cost and potential returns.
Comparative Analysis
Compared to similar high-volatility slots, Ra vs Osiris stands out for its dual-mode feature and high multiplier potential. Its mathematical structure is reminiscent of Zeus vs Hades but offers a unique twist with walking wilds and respin mechanics.
Bankroll Guidance for Ra vs Osiris
Recommended due to high volatility and potential long stretches between bonus triggers.
Source: Vendor ATTRIBUTES: Free Spins Hit Frequency 1 in 204.76
Close to base RTP but costly; consider only with a substantial bankroll.
How Ra vs Osiris Compares
Benchmarks against similar slots from the SlotsOnFire catalog.
| vs. | RTP Delta | Mathematical Note |
|---|---|---|
| Book of Dead | +2.28 pp | While Book of Dead sticks to a single volatility model, Ra vs Osiris provides more flexibility with its dual-mode setup and higher RTP. |
✓ Pros
- •Two volatility modes for varied gameplay
- •High maximum win potential of 25,000x
- •Expanding wilds with multipliers up to 1,000x
✗ Cons
- •High volatility can lead to long losing streaks
- •Expensive bonus buy options
- •Low odds of hitting the maximum win
Bottom Line
Ra vs Osiris is a compelling slot that combines high volatility with innovative features, making it a strong contender for players seeking large, albeit infrequent, payouts. The choice between Ra and Osiris modes allows players to tailor their experience, providing either more frequent bonuses or higher potential wins. While the bonus buy feature offers immediate access to the game's most lucrative aspects, it comes with a high cost that may not suit all bankrolls. Overall, this slot is well-suited for risk-tolerant players looking for a thrilling and potentially rewarding experience.
Slot comparison
How Ra vs Osiris compares with Fury of Anubis and Gates of Olympus POP
Of these 3 slots, Gates of Olympus POP has the highest RTP (97.05%), per published game stats.
| Game | Links | |||
|---|---|---|---|---|
Ra vs OsirisPragmatic Play | 96.53% | High | 25,000x | This page |
Fury of AnubisPragmatic Play | 96.52% | Medium | 10,000x | View Fury of Anubis reviewPlay Demo of Fury of Anubis |
Gates of Olympus POPPragmatic Play | 97.05%★ | Low-Medium | 25,000x | View Gates of Olympus POP reviewPlay Demo of Gates of Olympus POP |
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Andrew
Engineer, Slots Player, Family Man
Reviewed on September 20, 2026
Slot Details
| Provider | Pragmatic Play |
| Release Date | Sep 2026 |
| RTP | 96.53% |
| RTP Range | 94.52% - 96.54% |
| Volatility | High |
| Max Win | 25,000x |
| Reels | 5 |
| Rows | 5 |
| Paylines | 15 |
| Hit Frequency | 14.8% |
| Min Bet | $0.1 |
| Max Bet | $250 |
| Theme | |
| Features |
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Frequently Asked Questions
What is the RTP of Ra vs Osiris?
According to the vendor math sheet, the RTP of Ra vs Osiris is 96.53% in Ra mode and 96.54% in Osiris mode.
How can I trigger the free spins feature?
Landing three or more scatter symbols anywhere on the reels triggers the free spins feature, awarding six free spins.
What is the maximum win possible in Ra vs Osiris?
The official rules confirm the maximum win is limited to 25,000x the bet.
Is there a bonus buy feature available?
Yes, Ra vs Osiris offers a bonus buy feature, allowing players to purchase free spins directly at a cost of 100x to 500x the bet.
What is the difference between Ra and Osiris modes?
Ra mode offers higher chances of free spins with lower average wins, while Osiris mode provides less frequent, higher average wins.
What is the volatility of Ra vs Osiris?
Ra vs Osiris has High volatility. High volatility slots pay out less often but offer the potential for larger individual wins. Bankroll management is especially important.
Is Ra vs Osiris mobile-friendly?
Yes, Ra vs Osiris by Pragmatic Play is fully optimized for mobile devices and can be played on smartphones and tablets.
What mechanics does Ra vs Osiris use?
Ra vs Osiris features Expanding Wilds along with Free Spins, Walking Wilds, Buy Feature, Gamble Feature, Multipliers.
Andrew Mueller is the founder of SlotsOnFire and holds a B.S. in Electrical Engineering (BSEE). Since 2008, he has leveraged his analytical background to deconstruct complex slot mechanics, focusing on the mathematical integrity and algorithmic logic behind RNG systems.
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