Plants vs. Zombies version 1.0 is a popular tower defense game where players use a variety of plants to stop waves of zombies from invading a house. Key features of the game include a diverse assortment of plants and zombies, each with unique abilities, and a range of different game modes such as adventure, puzzle, and survival. The software also includes a Zen Garden mode where players can take a break from action and grow their own plants. In addition, the game offers endless replayability with its array of levels and challenges.