AWESOME map!
Though playing single player, issue with monsters getting stuck half in/out of transporters, sound volume goes berserk. Either start over or run around and try to find which transporter has stuck monster. Not easily done because they can only be seen from certain angle. Can only kill if seen.
Still enjoy though, map is just cool.
edit 12/19
modify (4) transporter locations to only have 1 transporter at each location (had 3), moved the destination out away from transporter. Near as I can tell with multiple transporters and destination at same location monsters could 'loop' forever.