NaaC is a pretty good Smash TV clone with all the action focused in one room for the entire game. Aliens will barge through walls from the top of the screen, then left and right. Fortunately better weapons occasionally appear out of thin air, although ammo conservation is vital since they run out pretty fast.

Name: NaaC
Developer: Bloody Monkey
Category: Action
Type: Freeware
Size: 10MB