Privateer: Gemini Gold "Back in 1993 Privateer was released as part of the Wing Commander series and became a great success in the gaming industry. Over 10 years later a small group of privateer enthusiasts reintroduced the game with a new graphic engine and real 3d spaceflight. As Grayson Burrows you inherited a small old scout class ship from your grandfather, to start over as a Privateer in a new and sparsely populated sector of the Confederation. Take your chance and become a pirate, merchant or bounty hunter upgrade your ship and experience the hard truth in a border sector where no one has anything to give away... " This game runs on Linux, Windows, and Mac OS X.
Savage 2 "Journey back to the fantasy realm of Newerth to continue the epic battle of humans versus beast. Traditional RTS play is combined with fast action combat in a multiplayer environment. It is all waiting for you in Savage 2, download today and enjoy the entire game for 5 hours of free play time." [strike]The game is retail and must be purchased to play online, but is completely free for LAN play.[/strike] Savage 2 is completely free as of 12/09/2008! There is a client for Windows and one for Linux.
GEARHEAD I & II "GearHead is a futuristic roguelike game, created by Joseph Hewitt. GearHead 1 is the first roguelike to explore the world of "mecha" (giant robots). Lots of futuristic jobs and skills (mecha pilot, medic, etc.) are available, as well as piloting those mecha. A sequel, creatively named GearHead 2, is in the making." There are GearHead builds for Linux and Windows.
Trackmania Nations Forever - An updated version of Trackmania Nations, including new levels and a new graphics engine. TrackMania (My online ID is thomas234)
Freeciv "Freeciv is a Free and Open Source empire-building strategy game inspired by the history of human civilization. The game commences in prehistory and your mission is to lead your tribe from the stone age to the space age..." Clone of the tried and true Civilization game. Builds exist for Linux, Mac and Windows.
Diaspora "Project Diaspora is a 2D Space Trading MMORPG for Windows and Linux. Project Diaspora is a High quality, multi-player internet based game. Graphics are good, and game mechanics solid. Create your character or characters, buy a ship, outfit it with weapons, missiles, and equipment. Buy, transport and sell cargo at over a dozen planets in different zones of play." This game was just released open source and was natively built in Linux and can compile for *nix, Mac, and Windows.
Cave Story Slick, retro-style 8-bit graphics and music, an excellent soundtrack, silky controls, a great plotline and multiple endings. Something like a cross between Metroid, Megaman, and Symphony Of The Night, Cave Story is a modern classic you simply must play. Available in Japanese and English, with binaries for Windows and Mac. [strike]The Windows version also works absolutely flawlessly in WINE, so Linux users needn't feel left out.[/strike] There is now a fan-provided Linux port too; enjoy!
Conquer Online MMORPG http://co.91.com/ Perfect world MMORPG Perfect World 2 pics on left are CO 2 on right are PW If you play conquer dont trust anyone everyone on that game is a hacker or scammer as you can tell from the chats in the screenshots lol
I ran across Rusty Hearts as a freebie on Steam and have logged considerable time in the game. I really haven't played RPG or MMORPG's before, but it was easy to jump into this one. I believe the developer has several other games for free as well. I read about Torchlight before and it was recommended in Computer Power User (CPU).
Assaultcube a little bit of quake and a little bit of counter strike http://assault.cubers.net/ Minetest a lot like minecraft, arguably even better http://minetest.net/