Update: For those who don't have access to the Amazon Appstore (or even those who do and prefer not to use it), this game just landed in the Android Market. Go blow some stuff up.

Tower defense. Tower defense. Tower defense. There's definitely no shortage of TD-style games for Android. Don't' get me wrong - TD games are great. There are just a ton of them. Game development firm 11 Bit Studios must've realized that, too, so they went to the lab and carved away at their popular tower offense title Anomaly Warzone Earth and brought it to Android.

The game, once exclusive to iOS, is a twist on modern tower defense games, because instead of protecting your base from slews of rival armies trying destroy it, you are the one trying to destroy the opposing base. Choose the right squad, weapons, and route to blast your way to victory.

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The game offers several modes of play and rich graphical content in a post-apocalyptic alien-infested world. It's up to you to ensure our survival by blasting away at the other-worldly beasts.

Gameplay (it's on a iPad, please forgive):

Anomaly will set you back $3.99, but there is a catch, though - for the time being, it's exclusive to the Amazon Appstore. There's no word on whether or not the title will make its way to the Android Market, so we'll just have to wait and see. See the update at the top.

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Hit the link below to buy.

Anomaly Warzone Earth HD from the Amazon Appstore