Thanks for adding/updating these campaigns.
Tested this one on 18, works well. Minor bot nav issues, but they will teleport to you fairly quickly. Entering some vent ducts needed crouching and forward jumping.
Overall a pretty well done campaign. It's a long four-map campaign with dark maps. Look for an open sewer manhole cover in an apparent dead end in map 3 to advance further and look for a radio to activate the finale.