Plants vs. Zombies is a classic zombie defense game. Place different types of plants and fungi, each with their own unique offensive or defensive capabilities, around a house in order to stop a horde of zombies from eating the brains of the residents. The player starts with a limited number of seed pack types and seed pack slots that they can use during most levels. The number of slots can be increased through purchases with in-game money. The zombies also come in a number of types that have different attributes, in particular, speed, damage tolerance, and abilities.