List The Free Games You Actually Play

as I am a fan of military tactical shooter I could not fail to mention.....

• America's Army.

Eden Eternal.
It's a free-to-play anime MMO. It's really fun in my opinion.

Ttackmania Nation (new for me...like it)

Pirates Vikings and Knights II

Slaves to Armok: God of Blood, Chapter II: Dwarf Fortress aka Dwarf Fortress

Dwarf Fortress
Spelunky
Cave Story, but I don't play that on a pc.

World of Tanks

Dungeon Crawl Stone Soup. Nuff said.

TrackMania Nations Forever
Tactical Ops: AoT
DC Universe Online

Team Fortress 2, Champions Online and any number of Kongregate games (I would recommend Accelerator for a quick 5 minutes, and Rebuild (1/2) and Mastermind: World Conqueror for longer. Also, Learn to Fly 2.)

Age of Conan is quite a good F2P MMORPG

World of Tanks

Alien Swarm, League of Legends, Dead Frontier MMO

Hat Fortress 2, sometimes I play alien swarm. I don't like the format of most F2P games where you have to grind for a million hours, and it's usually not fun grinding on that game, otherwise I'd be playing it.

TF2, DotA 2, Insurgency

All about League.