Adult Swim Games and developer Grumpyface Studios will launch an evil twist on tower defense with Castle Doombad tomorrow on iOS.

The $2.99 game puts players in the role of Dr. Lord Evilstein, who's kidnapped a princess and needs to keep meddlers out of his castle. During its three chapters and 45 levels, players need to keep the princess safely within their evil clutches while deploying upgradable traps against do-gooders like archers, knights and superheroes.

You can check out Castle Doombad in the gallery below.

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