A couple of BM-style levels made to help the author get a job, which he did.
I don’t know if there were issues at the time of its release, but playing it on the latest version of Half-Life 1 via Steam is almost impossible without cheating. There is a fan that seems like it can only be passed by no clipping and the level crashes when you enter the dark room. Loading the second level manually means you must give yourself the suit and weapons.
When I reached the last image there doesn’t seem as if there is anything left to do.