Book of Helios Slot

The Return-to-Player percentage or RTP is 95.58% for the Book of Helios slot game, which is just within the average for most typical slot games. The developer calculates this to calculate the expected return for every $100 wagered, meaning in this case the expected return would be $95.58. However, this is not a guaranteed return for a single player, just what the game is expected to pay out across all players over a longer period than just one session.

The volatility of Book of Helios is set at high by the developer, meaning that wins are few and far between, although when it pays out, wins tend to be slightly bigger than that of low volatility slots that focus more on paying out more often in smaller amounts. And we can attest to this following our sessions on the game, as it can be a fair few spins before a win is triggered, but you can often then get a win that is 4x your bet value or more.

The part most people like to read about is the potential winnings. The maximum possible win in this game is 20,168x your bet value, although you won’t get there from just the symbols alone, although these do pay well as well. For a full breakdown of what the paying symbols are and how much they can pay out, check the table below for reference:

The main feature revolves around the wild scatter symbol. As mentioned, it can only appear across the three middle reels, and doing so will award a player with ten free spins. Before the free spins begin though a symbol is chosen at random to become a special expanding symbol during the free spins. When this symbol appears on a minimum of two or three reels (depending on which symbol it is) and can form a win, it will expand to take over the whole reel.

If the Book of Helios appears on any of the reels, it will expand vertically too, revealing a multiplier for any winnings up to 5x the win value. If each book reveals a multiplier of 5x, then each book will apply to the win meaning a maximum possible multiplier of 125x (5x5x5).