Based on Wikipedia: Plants vs. Zombies is a 2009 video game developed and published by PopCap Games. The player takes the role of a homeowner amid a zombie apocalypse. As a horde of zombies approaches along several parallel lanes, the player must defend the home by putting down plants, which fire projectiles at the zombies or otherwise detrimentally affect them. The player collects a currency called sun to buy plants. If a zombie makes it to the house on any lane, the player loses and must restart the level.