Free games for everyone:
Alien Swarm: install - storefront
America's Army 3: install - storefront
ArmA II Free [2]: install - storefront
BattleForge [2][4]: install
Between [2][4]: install - storefront
Codename Gordon: install
COIL [2]: install - storefront
Mightier [2]: install - storefront
Moonbase Alpha: install - storefront
Peggle Extreme: install - storefront
Sam & Max Episode 104: Abe Lincoln Must Die!: install - storefront
Spacewar: install
The Cat and the Coup: install - storefront
TrackMania Nations Forever [1]: install - storefront

Free 2 Play games / micropayment model:
APB Reloaded [5]: install - storefront
Bloodline Champions [5]: install - storefront
Bullet Run [5]: install - storefront
Champions Online: Free for All: install - storefront
CrimeCraft GangWars: install - storefront
DC Universe Online [5]: install - storefront
Dungeons & Dragons Online: install - storefront
EverQuest II: install - storefront
Fallen Earth Free2Play: install - storefront
Global Agenda: Free Agent: install - storefront
Gotham City Impostors Free to Play: install - storefront
Iron Grip: Marauders: install - storefront
Magic: The Gathering – Tactics: install - storefront
Microsoft Flight [5]: install - storefront
Moon Breakers [5]: install - storefront
Pandora Saga: Weapons of Balance: install - storefront
PoxNora: install - storefront
Puzzle Pirates: install - storefront
Realm of the Mad God: install - storefront
Rise of Immortals: install - storefront
Spiral Knights [5]: install - storefront
Super Crate Box: install - storefront
Super MNC: install - storefront
Star Trek Online: install - storefront
Stronghold Kingdoms: install - storefront
Team Fortress 2: install - storefront
The Lord of the Rings Online [5]: install - storefront
Tribes: Ascend: install - storefront
War of the Immortals: install - storefront
World of Battles: Morningstar: install - storefront

Free 2 Play games for regional players: (aggressive IP block or content access restriction can be applied)
Alliance of Valiant Arms: install - storefront
Age of Empires Online: install - storefront
Atlantica: install - storefront
Blacklight: Retribution [5]: install - storefront
Brawl Busters [5]: install - storefront - registration workaround
Combat Arms: install - storefront
Dungeon Fighter Online: install - storefront
Forsaken World: install - storefront
MapleStory: install - storefront
MicroVolts: install - storefront
Rusty Hearts [5]: install - storefront
Vindictus: install - storefront
War Inc. Battlezone [5]: install - storefront