Plants vs. Zombies: Defenders of Earth

(I'm publishing right now because I need to save, last time I spent two hours making this article and accidentally bumped F5 making me lose all my progress. Least to say I was frustrated.)

Plants vs. Zombies: Defenders of Earth is a tower defense game  developed by PopCap Games  and the third in the Plants vs. Zombies series. Like the other games in the series, you must defend your home and your brains from large waves of zombies using your army of plants.

Summary
After the events of Plants vs. Zombies 2, everything goes back to normal for a while. Soon, the zombies have gathered too numerous and you escape to a small camping site near a river. You think you're safe, but soon you hear the distant groans of the undead. You eventually defeat all the zombies, and you head back to the city when it turns to dusk, but you get ambushed and must defeat more, in the darkness of the downpouring night. To be continued...

Areas
There are a total of eight areas in Plants vs. Zombies: Defenders of Earth. Each one has 20-40 levels, and all except Zomboss' Castle gain ten more once the final boss is defeated.

Trivia

 * The game's title is a pun, because the player defends many areas around the globe, but they also defend their land, which is generally made of earth, another name for soil.