Ricochet And Zombies - Version 4.9 The premise of the game is very simple. The player shoots zombies by calculating the ricochets of the bullets off the surrounding walls. With each level, the difficulties mount so that it will be more challenging to determine the ideal angle of the bullets.The premise of the game is very simple. The player shoots zombies by calculating the ricochets of the bullets off the surrounding walls. With each level, the difficulties mount so that it will be more challenging to determine the ideal angle of the bullets.The premise of the game is very simple. The player shoots zombies by calculating the ricochets of the bullets off the surrounding walls. With each level, the difficulties mount so that it will be more challenging to determine the ideal angle of the bullets.