While there are many open-source games available (just see the recent discussion about the most advanced GPL-ed FPS), most of them are based upon the ioquake3 game engine that in turn is based upon id Software's open-source id Tech 3 engine. There's also games like Nexuiz that use the DarkPlaces engine and then also Warsow that uses QFusion.

"Free Gamer, an open source gaming blog, has recently become the center of open source artists, developers and gamers. In its forums, the GPU-hungry Classical Java RPG and the Neverball-killer irrlamb have found their second home.

For those trying to find a new Linux game that offers good graphics while not being a first person shooter with little to no plot -- as is the case for a majority of the commercial and open-source games available for Linux -- the Amnesia: The Dark Descent game is expected to be released next month.

For a long time KDE has come with an assortment of games. Collectively, this suite of games is simply called “KDE Games“. With the advent of KDE 4, all of the KDE games were given face lifts and a standard set of features that make moving from game to game a seamless exercise. The games are two dimensional and do not run inside of a separate layer like SDL.

There is no denying the huge selection of open source games available for Linux. Playing through all of these games would entertain many gamers for years. Nevertheless, there is still a massive market for commercial games. If Linux is ever going to usurp the desktop market, it needs a regular source of native high quality games that rival commercial games available on Windows.

While most open-source games still lack the graphics quality and features that the latest proprietary game engines support within retail games that are backed by the large studios, their quality has been improving as with their artwork and other characteristics. As an example of this, Warsow 0.5.

A good open source platform game that never gets a mention is The Goonies: 20th Anniversary Edition. This game is a remake of the classic NES / Master System version by Konami. The same team is also responsible two rather fun arcade top-down racing games, F1 Spirit and Road Fighter, which are also remakes. I'm not sure what the source license is for these (ack, there goes my Free Software credibility) but you can get the source and the games compile / run on the 3 major platforms (y'know, Lin/Win/Mac).

At one time, asking if Linux could play games elicited laughter and disappointment. Games were basic and lacked the graphics and game play that Windows offered. However this is starting to change and dozens of high quality games have been released to run on Linux platforms.

We’ve all heard of open source games like Tuxracer and Wesnoth, and of commercial games like Quake and Unreal Tournament but there are a number of lesser known Linux games that deserve some more attention. Not all these games have the latest 3D graphics but what they lack in state of the art visuals they more than make up for in depth of gameplay and replayability.