Textmode Quake 2
Artemis writes: "Following the Quake 2 source code release under the GPL, here's the follow-up of the famous ttyquake, it's a text mode Quake II called aaquake2 which has just been released. Time for more 3d text mode gaming fun! The site includes screenshots for those of you who haven't seen Quake-turned-Text before."
The link above seems to be slashdotted, try this one.
It's a window manager for your terminal. http://linuz.sns.it/~max/twin/
Some fool compiled an xserver with aalib and you can see the output including screenshots of enlightenment menus etc here:
http://www.meow.org.uk/stan/xserver/
Maybe that'd work with xquake?