Plant Vs. Zombies is a very popular tower defense game which involves zombies and plants fighting each other. The game was developed by PopCapGames which is originally based in Washington, United States. The set up of the game revolves around an army of zombies attacking a home owner who owns a group of plants equipped with combat weapons and fighting skills. Each plant has specific offensive and defensive skills that can be used in the game play. To use a plant in the game, players should collect sun in the field. Plants cannot move to other locations and can only attack zombies in their own lane. The objective of the game is to repel this army of zombies from time to time. Zombies will constantly walk towards the home owner and once the lawn mower is breached, the gamer will lose the game. There is a certain time in the game that informs gamers about the incoming horde of zombies that will attack the home base. As the game progresses, players can unlock new plants that can be used in fight scenes and can encounter challenging scenarios. The game also includes other playing fields such as swimming pools and rooftops.