The rules are simple: you must survive the waves of the undead. You will be faced with many waves of increasingly difficult enemies. If you can keep yourself alive, you can advance to the next level. However, you will lose if you are killed by one of the undead.

In order to advance to the next level, you must perform more complex attacks. You will also need to use different weapons to be able to defeat the enemies. There is a limited number of weapons and ammo, so you must be careful about using them.

There is also an optional difficulty level that can be chosen by the player.

There are several different enemies that you must face in the game. Some of them are simple and easy to defeat, while others are more difficult and challenging.