Book of the Jungle Review
Book of the Jungle is a jungle-adventure book slot from Retro Gaming, played on five reels of four rows. Explorers and jungle animals lead the way to the free spins.
Ten lines on a taller grid
Ten fixed lines pay from left to right, with line bets from 0.01 to 10. The top symbols pay up to 1,000× the line bet.
The game's rules files carry this title's name for the whole family of Retro Gaming book slots.
Book of the Jungle Features
The scatter wild
The wild is also the scatter. Three, four or five anywhere pay 2×, 25× or 250× the total bet and trigger 10 free spins, which can be retriggered for 10 more.
Expanding symbol
At the start of free spins one symbol is chosen as the expanding symbol. After each spin it expands to cover its reels whenever that creates a win, and it pays on all lines even when the reels aren't adjacent.
Retro Bet
Retro Bet costs an extra amount equal to the total bet and unlocks a multiplier box worth x1 to x5. Free spins triggered with it on keep the multiplier box.
RTP and maximum win
The demo is set to 95% RTP and caps wins at 1,000× the bet.
Book of the Jungle Pros and Cons
Strengths
- Classic book mechanics
- Taller 5×4 grid
- Multipliers with Retro Bet
Limitations
- 1,000× cap
- Retro Bet doubles the cost
Our Verdict
Book of the Jungle is the template for the studio's book games and a solid example of the genre.
Book of the Jungle FAQs
How do free spins work in Book of the Jungle?
Three or more scatter wilds award 10 free spins with one expanding symbol; they can be retriggered.
What does Retro Bet add?
A multiplier box worth x1 to x5, for an extra cost equal to the bet.
What is the RTP?
The demo is set to 95%.
Sources and game-version notes
Information checked 31 October 2026.
Rules, RTP, lines and maximum win were read from the embedded game's help files and start-up configuration on 31 October 2026. The RTP shown is the demo's setting; casinos can run other versions.
