Underhell is a Source Engine game developed by the Underhell Team in collaboration with We Create Stuff. Underhell Chapter 1 requires ONLY Source SDK Base 2007 installed. No Source game is required.

MaxLebled says

10/10 - Agree (49) Disagree (3)

That's only the prologue?!

Seriously, just THAT prologue was far better than 90% of the mods out there. The voice acting is great, the level design is excellent and good-looking in all places (there are a few under-detailled areas, though), and the house system is neat.

My only complaint is that it seems to suffer from a lack of optimization, especially in the house... too much overdraw for a weak GPU, I guess?