Best UT2004 mod ever made: Alien Swarm (gameplay video)
Alien Swarm is a cooperative-campaign mod for Unreal Tournament 2004.
This video shows an online-played mission, some people are even voice chatting.
The video is recorded in window mode so the text might look a bit odd, but it's probably unreadable anyway... Some parts of the video are cut.
Official download:
http://www.blackcatgames.com/asv1/dow...
Community pack (includes everything you need to play and all frequently played campaigns):
http://promethius.thehavennet.org.uk/...