The expansion pack Half-Life: Decay is fully co-op and requires both players to work together to solve the puzzles and overcome the obstacles.
The PlayStation 2-port of the FPS-milestone follows the original story but boasts graphical upgrades as well as extended levels and overhauled level design.
In addition it includes a co-op-focues expansion pack in which the players take control of Gina Cross and Colette Green. They are the scientists that put the sample in the elevator for Freeman. If played solo, the player can switch between the characters with the other one being controlled by the AI.
This page contains co-op info for Half-Life on the Playstation 2. All information about Half-Life was correct at the time of posting. Information is subject to change. If you see any errors please email us.