I made a deathmatch map for the 3D Buzz mapping competition a couple of years back, was called Dogs of War. Some shots of it if yer interested:
http://www.zealousquakefan.com/2010/10/a-ut3-level/
It's not really finished, and was a remake of something I'd made in ut2k3. I also built it more like a ut2k3 map, so it has an excess of BSP that needs stripping out really. The competition was very interesting cause I saw how the winners actually built stuff :)
I plan to go back to it and finish it, but I wanted to create something single player. Only ever really built multiplayer stuff that I played with friends, single player is vastly different :E