Book of Dead: a Classic Built Around One Symbol
Book of Dead is one of Play'n GO's best-known slots and a natural pick for the featured list: the layout is simple, yet the free-spins round puts it firmly among high-volatility games. If you are new to the "book" family of slots, this is the clearest place to learn what an expanding symbol does and why this kind of machine pays rarely but, when it does, pays bigger.
Book of Dead at SlotoroKey facts
| Provider | Play'n GO |
| Layout | 5 reels × 3 rows, 10 adjustable paylines |
| RTP (published) | 96.21% |
| Volatility | high |
| Maximum win | 5,000x the stake |
| Features | free spins with an expanding symbol, gamble option |
The RTP is the provider's published figure. A casino can run a different configured version, so open the game's info screen and check which one you are actually playing.
How the expanding symbol works
In the base game Book of Dead is a straightforward line slot: wins come from matching symbols running left to right along one of the ten lines. The interesting part is the free-spins round. At its start the game picks one symbol that behaves as an expanding symbol for the whole round: when enough copies land, it fills entire reels and can pay regardless of the line structure. If the chosen symbol is a premium one, the round can swing hard; if it is a low-value one, the round often ends modestly. That is why results are so uneven — a large share of the game's return is concentrated in these rare rounds.
About the gamble option
After a win the game offers to gamble it on a single guess: it either grows or disappears. This never improves your odds; it only adds variance. Players who work to a budget usually skip it, or use it only on a small amount decided in advance.
Who it suits, and with what budget
High volatility makes Book of Dead a game for patient players who accept that twenty or thirty spins may pass without a meaningful win. Pick a stake that lets your session budget last at least 100–200 spins. Switching off lines only looks cheaper: with fewer lines active the expanding symbol pays less often, so most players keep all ten lines and lower the line bet instead.
How it differs from the rest of the list
Among the eight featured games, Book of Dead is the purest old-school machine: no cascades, no multiplier wilds, no bonus buy. Fire Joker 100 comes from the same studio with the same published RTP, but at medium volatility with shorter, steadier cycles. The Nolimit City titles such as Mental 2 offer far higher caps in exchange for even harsher swings.
Start with the demo
If the Slotoro lobby offers a demo mode, begin there. Watch how often the feature arrives and read the paytable to see what each symbol is worth. A demo cannot predict real-money results, but it gives you an honest feel for the pace before any money is involved.