BERSERK!
I'd love to see this get updated so much. As for the other choices:
DiabloRL - no offense, but I've played so much Diablo, Diablo II, LoD + mods that it's at the bottom of my list. If it winds up getting good and updated, though, I'll pop in the CD and play it through.
AliensRL - I wouldn't mind seeing this balanced and tweaked, as it's very cool and different, but my only experiences with it so far are running out of ammo and getting killed on level 1 a few times.