Once they've conquered that, players can turn to several other modes offering up new challenges – as well as the opportunity to revisit old ones.
The game's main campaign is a lengthy affair, featuring 50 levels split across five environments which are broken up by imaginative mini-games. They can also pick up coins from fallen zombies to buy new plants from the in-game shop, which is run by their eccentric neighbour, Crazy Dave. At the end of every level, they unlock a new plant and their arsenal of foliage steadily grows. To prevent this, players are given an array flora and fungi offering them both offensive and defensive options – ranging from pea-shooting plants, to immovable rocks to spikes which attack the zombies' feet. If the zombies manage to cross the lawn and enter the house, the player loses.
The zombies come in a variety of forms some wear buckets and traffic cones to ward off damage, some sprint across the lawn in American football gear, while some float above the lawn using balloons. The game's basic premise is simple the player is trapped in a house and has to fight off wave after wave of approaching zombies.
