Zeus Arena is basically an Xperia PLAY optimised port of the ioquake engine. This means that as long as you own a legal copy of Quake III Arena, you can use Zeus Arena to play it. If you haven’t got Quake III, then you can also give free first person shooter OpenArena a whirl. Click through for a video of Quake III Arena in action on the Xperia PLAY.
Via Pocket Gamer.