Half-Life 2

Counter-Strike: Source

Day of Defeat: Source

Half-Life 2: Deathmatch

Half-Life 2: Episode One

Portal

Half-Life 2: Episode Two

Left 4 Dead

Left 4 Dead 2

Zombie Panic! Source

Pirates, Vikings, and Knights II

Empires Mod

No More Room in Hell

Blade Symphony

Fistful of Frags

Lost Squad

Pool Nation FX Lite

The Forgotten Ones

Double Action: Boogaloo

PD Howler 9.6 Digital Painter and Visual FX box

BrainBread 2

Black Mesa

Retaliation: Enemy Mine

Uebergame

Soul Shards

Star Crusade CCG

Day of Infamy

Eradicated

Alien Swarm: Reactive Drop

Unlasting Horror

Kreedz Climbing

Sunrise: survival

City of Ages: Picture Supportive Text MUD (server and client included)

A day for a kitten

Sol Galaxy Defender

Block Shock

Battle For It All

Inbound

Emoto

Terro Bot