Just when you thought all the plants were trampled and all the zombies were shot down, Plants vs. Zombies: Garden Warfare has some more botanical, undead fights still left to go.

Sergio Leone, Clint Eastwood and the Duke should be proud, because Plants vs. Zombies: Garden Warfare's newest downloadable game pack pays tribute to the old west. This new trailer starts off with many animated zombies and plants dead on the ground as if some massive war recently took place. As we see all the casualities, an Ennio Morricone-esque song looms in the background. All of a sudden, we get introduced to the newest contenders to the Plants vs. Zombies battlefield.

The Zomboss Down downloadable gamepack includes 8 new playable characters, the Cactus Canyon Gardens & Graveyards Map, an increased level cap for each character, new challenges and over 200 customization items to make your forces stand out from the rest. Be prepared to see how the west was won as the Zomboss Down game pack is now available for free on the Xbox 360 and Xbox One versions of Plants vs. Zombies: Garden Warefare.

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