The game design has a laboratory theme, we are in a place where a crazy doctor is performing horrible experiments. In the background of the coils you can see his operating room and, on the right, you can see the same doctor with a syringe full of green liquid.
The lowest paying symbols are 10, J, Q, K and A. Landing 5 of the same type of symbol pays between 2.5X and 5X the bet. The symbols that pay the most are the pills, the brain, the mask, the helmet and the doctor himself. If you get 5 symbols of the same type, the bet pays between 10X and 125X. These higher paying symbols create winnings as soon as you get 2 symbols of the same type. The game’s wild symbol is also the game’s scatter symbol, where it consists of a bloody green book.
You can win up to 10,000 times the bet.
The game’s scatter wild symbol helps create more winning combinations by substituting for other payout symbols. If you get 3 or more of this type of symbol at the same time, the free spins feature is activated and depending on whether you get 3, 4 or 5 symbols, you get an instant payout of 2.5X, 25X or 250X respectively.
If you get 3 or more wild scatter symbols, the Free Spins feature is activated as mentioned and you are therefore welcome with 10 free spins. Before you can start using these spins a special expanding symbol will be randomly selected. During the spins, this special expanding symbol will expand to cover the entire reel when included in a win. It is only necessary that the correct amount of this type of symbol stops to create a win and it does not need to be on adjacent reels.
During the spins you can reactivate extra free spins by landing 3 or more wild scatter symbols at the same time, which still gives you 10 extra free spins. You will perform these extra free spins with the same special expansion symbol as before.
You can choose to use the Super Stake function, which doubles the amount of your bet but does not affect the payment of the symbol. By activating this option, the golden scatter wild symbols will land on reels 2, 3 and 4, so these create golden reels within the free spins feature. For example, if you get a medical symbol on reel 1 but not on any other reels, the activated golden reels will expand with this medical symbol to generate a win.
