Plants vs. Zombies: Rage Against the Machines

Plants vs. Zombies: Rage Against the Machine is a game set after the events of the first two games. There is a robot uprising and both the plants and the zombies are at stake - the robots plan to make the world perfect for robots, which involves making it inhospitable for plants, and they destroy zombies due to their human protocols. As a result, the plants and the zombies team up and fight the robots.

Background Info/Story
It is the year 2019. Mankind created the first sapient computer, which promptly took over factories and mass-produced sapient robots to do its bidding. Humanity has been able to survive fairly well, relying on 2009 technology and EMP grenades, keeping all of Europe and most of Russia perfectly safe. However, America is in a bit of a bind - its infrastructure was so dependant on the machines that it broke down to 19th-century standards. Of course, one courageous person, who helped defeat the zombies twice, along with his crazy neighbor, Crazy Dave, team up with the twice-evil zombie leader Doctor Zomboss and his zombie army to save America and the world.

Areas
Tutorial - Pretty much PvZ2's Tutorial, except it also introduces using zombies as teammates.

Zomburg - The former metropolis of the zombies, now overrun with robots. Some rough-and-tumble zombies have been able to hold them off long enough for you to get there.