This PlayStation 2 version of the PC's immensely popular, community supported, critically acclaimed "thinking man's" first-person shooter brings graphical enhancements and additional gameplay modes to the Black Mesa Research Facility. In addition to the basic single-player story introduced in the 1998 game, this PS2 release offers a two-player cooperative "Decay" game mode, which features all-new characters in a new plot based on the original scenario. ~ T.J. Deci, All Game Guide