| Studio | Greentube |
|---|---|
| RTP | 95.02% |
| Stake range | 0.10 – 100.00 |
| Volatility | Medium |
| Layout | 5 × 4 + 5 × 12 reels, 100 paylines |
| Released | 18 November 2019 |
Book of Ra deluxe 10 slot review: two reel sets, 100 lines and a 95% RTP
Book of Ra deluxe 10 is Greentube's 2019 reworking of Novomatic's Book of Ra: the same expanding-symbol free spins, played on two reel sets at once, a 5 × 4 grid with 25 lines and a 5 × 12 grid with 75 lines, 100 paylines in all. The RTP is 95.02%, lower than most slots we review, and the volatility is medium: more frequent small wins than the original, with stacked symbols and wilds that copy from the small grid to the large one.
How Book of Ra deluxe 10 plays
Every spin runs both grids. The upper set has five reels and four rows with 25 paylines; the lower set has five reels and twelve rows with 75 paylines. Wins pay left to right on each set separately, and the stake, from €0.10 to €100 a spin at most casinos, covers all 100 lines. The explorer and the mummy land as stacked symbols on the large grid, and a stack of wilds on the small grid is mirrored onto the same reels of the large one.
What a session costs: 100 spins at €0.10 and 95.02% RTP cost about €0.50 on average, and 100 spins at €1 about €4.98. Against a 96.5% slot that is about €1.50 more per 100 spins at €1, the price of the Book of Ra name.
Features
Free spins with an expanding symbol
Three, four or five Book scatters start 8, 12 or 20 free spins. Before the round the Book picks one ordinary symbol as the special expanding symbol: when it lands it fills its reel, and expanded symbols pay on every line of that grid even when they are not adjacent. Stacked symbols that land during the round are mirrored across to the second grid, so one expanding symbol can pay on both sets at once. Three or more Books during the round add more spins.
Stacked symbols
The explorer and the mummy appear as stacks that can fill a whole reel on the twelve-row grid. A full reel of the top symbol on 75 lines is where the game's larger wins come from.
Transferring wilds
A stack of wilds on the upper grid is copied to the same reel positions on the lower grid, in the base game and in the free spins. Two wild reels on the small grid become two wild reels on the large one as well.
RTP and volatility
The game's information screen gives 95.02%; Greentube publishes no other version for this title. That is about one and a half points below the common 96.5% and three points below Big Bad Wolf; it adds up over a long session.
The volatility is medium. The 100 lines and the twelve-row grid pay more often than the original ten-line Book of Ra, and the stacked and transferring wilds give regular mid-size wins, but the ceiling is low: Greentube publishes no maximum win, and the review that preceded this one measured the top line win at around 1,200 times the stake. How slots pay explains the trade-off between hit rate and ceiling.
Who it suits
Book of Ra deluxe 10 suits players who know the Book of Ra free spins and want them to land more often, with two grids to watch instead of one. It does not suit anyone choosing a slot by RTP or by maximum win: 95.02% is poor value, and the top prize is small for a book slot. If you want the formula with a better return, Book of Dead pays 96.21%. It is a Greentube game, the online arm of NOVOMATIC.
Book of Ra deluxe 10: FAQ
What is the RTP of Book of Ra deluxe 10?
95.02%, per the game's information screen. Check it at your casino before you play.
How do the two reel sets work?
Both spin at once on one stake. The upper 5 × 4 grid has 25 paylines, the lower 5 × 12 grid has 75. Stacked symbols and wild stacks on the upper grid are mirrored onto the lower one.
How many free spins do I get?
8, 12 or 20 for three, four or five Book scatters, with a random expanding symbol for the round; three or more Books during the round add more.
What is the maximum win?
Greentube publishes none. Our earlier review put the top line win near 1,200 times the stake, which is low for a book slot.
Sources
- Greentube, Reel Reveal presents Book of Ra deluxe 10: the two reel sets, Stacked Symbols, Transferring Wilds, Special Expanding Symbols.
- The game's information screen (RTP 95.02%, 25 + 75 paylines, free spins counts), as recorded in our review of November 2019; release 18 November 2019.
Checked 30 October 2026.
