Half-Life: Decay

Half-Life: Decay
Developer(s)	Gearbox Software
Publisher(s)	Sierra On-Line
Designer(s)	Randy Pitchford[1]
Writer(s)	Matthew Armstrong Brian Hess Randy Pitchford
Series	Half-Life
Engine	GoldSrc
Platform(s)	PlayStation 2
Release	NA: November 14, 2001 EU: November 30, 2001
Genre(s)	First-person shooter
Mode(s)	Multiplayer

Half-Life: Decay is a multiplayer-only expansion pack for Valve's first-person shooter Half-Life. Developed by Gearbox Software and published by Sierra On-Line, Decay was released as part of the PlayStation 2 version of Half-Life in 2001. It is the third expansion pack for Half-Life, and like its predecessors, Decay returns to the setting and timeline of the original story, albeit portraying the story from the viewpoint of a different set of protagonists: two scientists working in the Black Mesa Research Facility. Decay is a cooperative multiplayer game, designed to be played by two people working together to pass through the game's levels.

Decay was not a critical success, but was received with some positivity by video game journalists. Many reviewers felt the game was best when played with other players, but that its more puzzle-oriented gameplay somewhat detracted from the overall experience. A number of reviews stated that the game simply felt like little more than an extra add-on for the PlayStation 2 version of Half-Life.