Black Mesa - Damocles (Part 1) - Walkthrough

Damocles is a story based singleplayer mod that takes place in a secret prototype laboratory located at the borders of the Black Mesa Research Facility. You are witness of the Black Mesa incident and find yourself inside an unknown laboratory where you have to escape from. You meet a new friend and encounter familiar enemies, such as the extraterrestrial Xenian aliens and the HECU military forces.