Half-Life: Uplink is the demo version of Half-Life. It was released on February 12, 1999, It contains completely original levels and storyline not found in the full original game. The demo was bundled with graphics cards and finally made accessible on Steam via the 25th Anniversary update for Half-Life.

Uplink was ported to PlayStation 2, and was released as an add-on on a PlayStation Underground demo disc in the June 2002 issue of the Official PlayStation Magazine. It can be played by entering a code from the Cheat Codes menu in the Options. The code is: Triangle, Square, Left, Right, Circle, X, Up, Down. This unlocks the Extras menu in the Options. The player can insert the disc from this menu to play the game.

This fan made port however allows you to directly play Uplink on PS2 without any kind of hassle.