The total number of identical symbols on the screen determines the win value. After each spin, all winning combinations are paid and removed from the reels. The remaining symbols are then dropped and the empty positions are filled with new symbols.
The zombie is located above the crevice. When the brain symbols land on the reels, the zombie eats them, leaving x5 multipliers on the positions where the brains were. If there is an existing multiplier on that position, it will increase by x5 up to a maximum of x50. Multipliers are triggered when the symbols on them are part of a winning combination, and only apply to winning combinations that have triggered them. Multipliers remain in effect until the end of the spin.
If 3 or more Scatter symbols land during a single spin, Free Spins are triggered. If 3 or more Scatter symbols land during Free Spins, additional spins are awarded. Free Spins and additional spins start from 10 and have 5 additional spins for each Scatter symbol over 3 up to a maximum of 25.
On spins that trigger Free Spins and during the feature, multipliers left by the Zombie are locked for the duration of the feature. If the maximum win in the game is reached, the feature will end.
Each spin during Free Spins can activate the Zombie Snacks feature. When this feature is triggered, a minimum of 5 brains must land on the reels for the zombie to eat.