Games

Battlefield 1942

Battlefield 1942 is still very much alive, you can still get it for free. EA made this game free to play in 2012. The new master server is http://master.bf1942.sk/

https://m.reddit.com/r/gaming/comments/3g8pcb/battlefield_1942

http://team-simple.org/download/

Evolution RTS

Warzone 2100

OpenRA

OpenRA is a Free Real Time Strategy project that recreates the classic Command & Conquer titles.

Open Arena

OpenArena is a community-produced deathmatch FPS based on GPL idTech3 technology

Best free FPS

World of Tanks

Ultrastar

UltraStar Deluxe is a free OpenSource karaoke game for your PC. The gameplay experience is similar to that of commercial product SingStar

Game Downloader

Game Downloader is a small open source download client with a server side library of games that are open source, indie or freeware.

Age of Defenders

Age of Defenders adds a colossal new twist on the much loved tower defense games, whereas, you not only defend your base but you attack too!

Need for Speed World

Racing game.

Free old DOS games

Battlefield Play4Free

If you ever played Battlefield 2 then you’ll instantly find Battlefield Play4Free familiar. Play4Free is essentially a reboot of Battlefield 2, except it runs in your browser and looks slightly better.

Glest

is a 3D real-time strategy game.

The Lord of the Rings Online

Dungeons & Dragons Online

Battle for Westnoth

Turn-based tactical strategy game with a high fantasy theme.

Track Mania

Racing game.

Torcs

Racing game.

America's Army

First person shooter.

FreeCIV

Civilization in your browser

Y8

Flash games

Nexuiz

is an Arena First Person shooter.

Voyage Century

Kuma Games