Named Game of the Year by over 50 publications, Valve's début title blends action and adventure with award-winning technology to create a frighteningly realistic world where players must think to survive. Also includes an exciting multiplayer mode that allows you to play against friends and enemies around the world.
It's a small mod made by me i was inspired by Garry's mod and thats about it.
had to compile the maps myself, 10/10 mod
Thank you