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.

CrazyDarkDemonMonkey says

10/10 - Agree (2) Disagree

Very intense and moves so smoothly throughout the prologue. The suspensed and unexpected twists and turns on every corner of the house, just building up tension, cause you never know what...Horror awaits to give you an extradinary scare that gets you jumpin with the feeling of doing than just more than crap your pants. -CrazyDarkDemonMonkey