Iam for sure waiting for UMP2 v3!
in UMP2 v2 there is a map called DM_firstblood
It's a nice medium sized map for about 4-5 people. It has a dark-red surface area with broken walls and ruiins, while there is an underground base with several rooms and a VENTELATION shaft for the aliens.
Me and some of my friends played this on the LAN, and it was really fun because it was a fast paced map and you constantly had to be on your guard.