Hotline Miami [Steam store page]
Prepare to enjoy smashing open heads with a bat, slitting throats, and shooting enemies at breakneck speed in a psychedelic environment.

Steel Storm: Burning Retribution [Steam store page]
A nice twist on the classic arcade top-down shooter. Similar mechanics of power-ups, but with complicated maps, mission objectives, and the ability to move in any direction. This is retro done right - worth playing.

Shadowgrounds [Steam store page]
A reasonably fun top-down shooter with a sci-fi storyline. The NPCs occasionally block your movement during combat - luckily they don't seem to take team damage. The flashlight also runs out of batteries slowly, which pulls you out of the game a bit.