Book of Old Ra
Unlock Ancient Egyptian Mysteries with Expanding Symbol Mechanics
4.6 Rating
500K+ Downloads
Free to Play
Limited time: unlock 50 free spins on first launch
Unlock Ancient Egyptian Mysteries with Expanding Symbol Mechanics
Limited time: unlock 50 free spins on first launch
Select your path to riches and claim exclusive promo codes
All bonuses subject to wagering requirements. Minimum deposit applies where stated. New players only. Bonus validity periods as specified. Terms and conditions apply.
Book of Old Ra operates on a proven 5-reel, 3-row slot engine with 10 fixed paylines, delivering authentic Egyptian temple exploration through cascading symbol mechanics. The core system revolves around the sacred book symbol serving dual roles as both wild and scatter, triggering the coveted free spins feature when three or more appear anywhere on the reels.
During the free spins bonus round, a randomly selected expanding symbol transforms standard gameplay into high-volatility treasure hunting. This chosen symbol expands to cover entire reels when appearing in sufficient quantity, bypassing traditional payline restrictions and calculating wins across all positions. The mathematical model employs medium-to-high variance with an RTP of 96.1%, balancing frequent small wins with substantial bonus potential.
The gamble feature adds strategic depth, offering players the option to double wins up to five consecutive times through card color prediction. Each successful gamble multiplies the current win by 2x, while failure forfeits the entire amount. This risk-reward mechanism integrates seamlessly with the base game's autoplay functionality, supporting up to 100 automated spins with customizable loss and win limits.
During free spins, one randomly chosen symbol expands to fill entire reels, creating massive win potential by ignoring payline restrictions. The expansion triggers when sufficient matching symbols land, calculating payouts across all visible positions rather than traditional left-to-right sequences.
The mystical book serves dual functionality as both wild substitute for all symbols and scatter trigger. Landing three or more books anywhere on the reels activates 10 free spins with the expanding symbol feature, while book symbols continue to substitute during base gameplay for enhanced winning combinations.
Every winning spin unlocks the optional gamble mechanism, presenting a card color prediction challenge. Correctly guessing red or black doubles the current win, with up to five consecutive successful gambles possible. The ladder displays potential winnings at each stage, with a collect option available after each successful prediction.
Configure automated gameplay for up to 100 consecutive spins with granular control over stopping conditions. Set maximum single win thresholds, total loss limits, and free spins trigger preferences. The system pauses automatically when bonus features activate, allowing manual control during high-value rounds.
The game employs a medium-high variance mathematical model with 96.1% theoretical return to player. This configuration produces less frequent but substantially larger wins compared to low-variance slots, with maximum potential reaching 5,000x bet during optimal expanding symbol scenarios in free spins mode.
Stake configuration accommodates players from 0.10 to 100.00 credits per spin across 10 fixed paylines, translating to 0.01 to 10.00 credits per line. The interface provides quick bet adjustment buttons alongside manual input, with total stake and line bet values displayed simultaneously for transparent wagering control.
Developer: Novomatic Interactive
Current Version: 2.4.1
Platform: Android 6.0+
Released: June 2026
Novomatic Interactive has specialized in land-based casino conversions for mobile platforms since 2012, bringing proven cabinet games to digital audiences with authentic mechanics preservation.
Free download for Android 6.0 and higher. No registration required. Install completes in under 90 seconds.
Download for AndroidAge 18+ required. Contains simulated gambling. Free to play with optional in-app purchases.