Based on the Quake engine technology, Half-Life is a rich, three-dimensional, first-person gaming experience filled with unique interactive creatures and non-player characters (NPC), detailed environments, and intricate puzzles. Half-Life adds enhancements to the engine to take advantage of newer 3D hardware and machine capabilities. Half-Life assigns you to a top-secret experiment at a decommissioned missile base. It's here you and your team have developed a cross-dimensional portal through which you glimpse an alternate universe with unusual beings. After using nuclear warheads to break through to the other dimension, you are set upon by the ghastly creatures. With multiple levels, worlds, puzzles, and characters. Supporting up to 32 players in head-to-head Internet/LAN play, Half-Life changes your sense of action games completely.