

The levels were also updated and extended based on the work from the Dreamcast port, and most of the bugs were ironed out, making it the most technologically advanced and stable version of the game to date. The game also features a two player multiplayer deathmatch mode (via split-screen) titled Head-to-Head and a new cooperative expansion called Half-Life: Decay that allowed players to play as the two female scientists Dr. The companies began exploring the possibility of bringing the game to the PlayStation 2 as early as November of 1999. Gearbox started making plans for the port with Sony in February of 2000. They received their development kits in early April. The game was announced by Sierra on Novem along with a two-player cooperative campaign known as Half-Life: Decay and a four-player multiplayer mode featuring 12 exclusive levels. It was later changed to two-player mode with eight bots. On-line multiplayer did not make the final cut as the console's connectivity options were not available at the time for the developers to implement.
