I don't know how modded it is on the server-side, but you can still drop a few buildings as aliens, and a sentry turret as marines. Good fun!
(ORB forever!)
The uwe implementation of combat for ns2 was last stand and the source is here https://github.com/unknownworlds/ns2_laststand
Looks like the combat mod is there too https://github.com/AlexHayton/NS2Combat
I don't know how modded it is on the server-side, but you can still drop a few buildings as aliens, and a sentry turret as marines. Good fun!
(ORB forever!)