Compatible enough for an HTC EVO 4G, but made for devices like the HTC EVO 3D, Balloon Gunner 3D brings balloon-based dogfighting slightly off the small screen. This is another game that utilizes stereoscopic 3D in an advantageous way.
The object is fairly simple: fly around, complete missions by shooting things, and don't get killed. I'd say on the 2D platform this is a meh game. It's fun, but tedious and feels kind of sparse.
On the 3D platform, it's a little easier due to being able to see how far away things are. My amusement factor is also higher in 3D, possibly just due to my eyes being crossed and holding the phone at the exact right angle to view, but also probably because they did it pretty well. The drawbacks for me are that the tilt steering throws off my 3D viewing angle. Even so, it's still a good and fun 3D shooter.
Check out a 2D gameplay video if you're on the fence, which you shouldn't be since the game is free.