Afterdark is a quick and simple edit of Valve's C1A0. It's a night time-y, after-hours version of it with extra rooms, pathways and such. It was compiled for The Specialists mod and uses it's appropriate entities for proper gameplay.

* Air ducts add a number of alternate pathways around the level as well as provide hiding and sniping places.

* Small details like shattering monitors, light switches, and moveable furniture add to the fun.

* The main feature is the airlock trap. Players can risk snatching the power-up and end up poisoned to death or running free and powerful.