Player has control of the "main" zombie in a series of maps. The goal of each map is to zombify all humans on the map. Some are helpless citizens who run in fear when you approach, and some are army guys that will shoot back.
Controls are simple - directional movement. When you are in contact with a human you start zombifying them (brains!) Other zombies that you make can be given three commands:
attack nearest enemy
If you avoid damage for a time you will regen your health. Each map has a star rating - perfect scores are based on speed and no zombies dying. Scenarios may require some forethought to maximize score.