Stellar Forces is a squad-level, turn based, multi-player strategy game. It is similar to Laser Squad or X-Com missions being multi-player across the Internet. Each player controls a squad of units and takes their turn using the client software to complete their mission and defeat their opponent. There are multiple missions available, as well as lots of different kinds of weapons and equipment. This game is completely free to play; all you need to do is register on the Web site, which then allows you to connect to other players and play as many games as you want.
Beat Back the Horde is a rhythm-time strategy game for Android 2.2 and up, focusing on fast-paced placing of units while tapping to the beat! Build up combos to spawn Über Units! It is playable in single-player mode, or in multi-player mode over Bluetooth, and can be learned in a minute and played for hours. It includes many achievements to unlock, five songs to master, adjustable difficulty single-player AI, and particle effects.