When not active, the other character is AI controlled for basic actions.It is set at the same time of the events in the original Half-Life, but from the perspective of other characters.

Singleplayer is also possible, but then switching between the two characters is necessary to advance. It is meant to be played with two players at the same time as it is more puzzle-oriented than the original game and the first two expansions. The third expansion for the original game, it features two-player cooperative gameplay (in split-screen) with the two female scientists Gina Cross and Colette Green as the protagonists. The PlayStation 2 version of Half-Life is a port of the Windows game, but with a significant overhaul for the weapons and character models, as well as the overall map geometry and some extended levels.It also includes an expansion pack that is referred to as Half-Life: Decay, which was never officially available as an expansion for the Windows game until it was eventually recreated as a modification.

Half life ps2 vs pc