It may seem weird to have a game within the tower defense sub-genre called Tower Defense
(it would be like Call of Duty
being called First Person Shooter
). But this is one of the most challenging and addictive games available at the app store. The game is set in the future; humanity’s greed has led to galactic conquest and a need to find new worlds. A planet rich with resources has been discovered and your goal is to conquer it, but it won’t be easy---alien life forms aren’t going to let you take that lying down. You’ll need to develop a different strategy for every level in order to protect your base from wave after wave of enemies. The challenge and difficulty are refreshing for a platform that has so many casual games that aren’t taken seriously. Be prepared to tell yourself “One more try!” at 2am.