There is Doom3 for Linux from id software. Tried on my Fedora Core 4 having 1 GB Ram. The Game was still very slow. The reasons I read at some performance comparisions that Doom3 was written using VC .Net and GCC optimization was not perfect. So there will always be 10% different.
Adding to this was the inbuilt video card of my machine.
VGA compatible controller: Intel Corporation 82845G/GL[Brookdale-G]/GE Chipset Integrated Graphics Device (rev 01).
At #linux IRC channel while discussing this issue, came to know that this inbuilt video card does not support OpenGL graphics well and might have performance lags. The suggested ones are nVidia and ATI.
After downloading the game id software's ftp server.
- The Installation was breeze,using ncurses. Cool way for Linux for a big application.
- Had to change some settings in my X.org conf file. Increased the Depth to 24.
- To improve the performance on Linux with inbuilt video card,Added something called VideoRam 128000 under Device section and turned off all the advanced options from the game.
Now, its playable, but I need to figure out how to play it :)