To perform a timedemo, type timedemo demo1.dem into the console. To get into the console, press Ctrl-Alt-`
Wine works with Doom3: http://forums.gentoo.org/viewtopic.php?t=206076&highlight=sound
4 pages link to Doom3:
lib/main.php:944: Notice: PageInfo: Cannot find action page
lib/main.php:839: Notice: PageInfo: Unknown action
lib/plugin/WlugLicense.php:99: Warning: Invalid argument supplied for foreach()