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.
I liked playing the Prologue back in 2011, was nice and promising. The level design quality was quite poor, but I hoped it will get improved. Indeed, later it was announced that the great looking Chapter 1 will also contain remake of Prologue. It was released, Prologue is the same (couldn't notice any change really), still the very poor lighting (is it that hard to tweak radiosity settings so it doesn't look totally washed out?), removed leaning (weird esp. when the Chapter 1 is more about stealth), the stealth is also questionably done (at least in Prologue). The house part is totally boring experience... I guess it's some artistic intent to really feel the atmosphere but it's overdone and/or not done properly. Even hilarious how short the actual "day" is ;) Anyway, managed to finish Prologue, again stuck in the House... couldn't get past it, hate the dreams... so I couldn't experience the Chapter 1 content at all, all the waiting was for nothing. Goodbye.