There is no shortage of great games to play on Valve's Steam service. Whether you want big budget titles or indie gems, Steam has something for everyone. You can add 13 more titles to the list that have been proven worthy by the Greenlight process on Steam. There are also a half a dozen software packages available as well. Here's the full list:

Greenlight Games

Blackspace (also check out our interview)
Darkfall Unholy Wars
Dawn of Fantasy
Dragon's Lair
Euro Truck Simulator 2
Gear Up
Kinetic Void - Space Adventure
The Light
No Time To Explain
Primordia
Sang-Froid: Tales of Werewolves (also check out our interview)
StarForge
Waking Mars

Software Packages

Action! Screen Recorder
Bandicam: Game Recorder
Construct 2
Display Fusion
HitFilm 2
You Need A Budget 4