Plants vs. Zombies, developed by PopCap Games, is one of the most iconic tower defense games on mobile. Released in 2009, the game introduced players to a quirky world where they must defend their home from waves of zombies using an arsenal of plants. Each plant has unique abilities, and players must strategically place them to stop the zombies from reaching their house. The game is known for its humor, cartoony graphics, and easy-to-learn mechanics, making it accessible to players of all ages.

Plants vs. Zombies's success has led to several sequels and spin-offs, as well as ports to various platforms. The game's simple yet engaging mechanics helped popularize the tower defense genre on mobile devices. It also introduced new concepts like sun collection (used as a resource to plant more defenses) and lane-based gameplay, which became hallmarks of the series. The game remains a classic in mobile gaming and is still widely played today, thanks to its replayability and nostalgic appeal.