Both have partial ports to Linux. I don't know why UT3 stopped (and if you ask icculus, he will get mad at you). idTech5 stopped because crap driver support,

Both have partial ports to Linux. I don't know why UT3 stopped (and if you ask icculus, he will get mad at you). idTech5 stopped because crap driver support, but now with Valve pushing ahead to fix that, I think id can resume work on Linux idTech5 if they wish to. EDIT: Actually UT3 engine DO work on Linux (and icculus that did it!) http://www.phoronix.com/scan.php?page=news_item&px=MTI1ODE http://www.phoronix.com/scan.php?page=news_item&px=MTI1O...