Zombies: reanimated dead and mindless creatures; decaying corpses with a hunger for human brains. They are the main antagonists within Plants vs. Zombies, as the objective of the game is to prevent them from getting to your house and eating your brains through the use of a variety of plants, many of which specialize in unique aspects and features. You can also defend your house with lawn mowers, automatically given to you on the first level of the game. However, in Puzzle_Mode Puzzle Mode I, Zombie levels and the Vs. Mode in the Xbox Live Arcade and Plants vs. Zombies Nintendo DS versions of the game, the player can play as zombies to overcome the defenses and reach the house to eat the homeowner's brains. This is also the same with the DS version of the game. Zombies, like their defensive counterparts the plants, are varied in strength as well as speed, and command unique aspects which need to be countered appropriately.