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.
Underground 2 was supposed to be the sequel to my first Half-Life singleplayer modification "Underground" which I released in summer 2002. Unfortunately I stopped working on it in December 2004 and never resumed the work. The levels I created so far became a demo without story or gameplay elements which can be downloaded and played via Steam or WON.