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.
Ho ho ho Merry Christmas and merry Mod of the Year!
Year in Review Quarter 01 January through till March 2011.