The default demo from Unity 3.4, this third person top-down shooter is well packed with gameplay.
Open Asset Store
The player infiltrates a building filled with not very happy robots, which explode in many pretty ways when collections of fast moving bullets are applied.
Optimized for Android and iOS, this game also runs very well on standalone builds and in a webplayer.
Dependent on platform, the game will present the player with dual sticks for navigation, aiming and shooting or WASD and mouse.
Requires Unity 3.4 or higher. Update now.