This mod is set in Games Workshop's, great Warhammer 40,000 ( 40k ) universe. Each map pits Imperial Space Marines against the Tyranid swarm, competing in a series of mission objectives, culminating in a battle to decide the fate of the planet. Latest scheduled play times and list of servers: steamcommunity.com/groups/exterminatusgame
The defence of an imperial forge-world played out in Exterminatus.
This video is a combination of Source Film Maker for setting the scene and actual online game play.