Underhell is a Half Life 2 Modification developed by Mxthe in collaboration with We Create Stuff.
Underhell Prologue requires a Source Engine game to run, and Source SDK Base 2006 installed.
Underhell Chapter 1 will require a Source Engine game to run, and Source SDK Base 2007 installed.
This is a preview of the BodyGroup system for Underhell.
Read Monthly Update 1 for more info