I don't know if anyone knows about this game, but I've just had a go
against someone I know over here in Australia, and it's pretty good fun!
Gameplay feels strangely like Quake even though it's a 2d shooting
thing. Check it out [1]!
It's probably the best 'action' game I've played that's open source and
available for linux.
[1]
http://www.teeworlds.com/
--
John Hunt - johnrhunt@???
http://john-hunt.com/