Half-life is a science fiction first person video game that was developed by Valve. It is the first installment in the Half-Life series. It is available among the common platforms i.e. Windows OS PCs, Linux, Mac OS X as well as PlayStation. The player controls Dr. Gordon Freeman who is the main character who has to fight his way out of an underground research facility. It is in this research facility that in one of the teleportation experiments went wrong and might end up being a quite the disaster. The Half Life Keygen can generate 100% working serial keys that would be used to activate the game.