Half-Life: Decay

Half-Life: Decay (2001)

by Gearbox Software, Valve, Sierra Entertainment
Genres:Platform, Puzzle, Shooter
Themes:Action, Science fiction
Game modes:Co-operative, Split screen
Story:Half-Life: Decay is an expansion pack for Valve Software's science fiction, first-person shooter video game Half-Life. Developed by Gearbox Software and published by Sierra Entertainment, Decay was released as part of the PlayStation 2 version of Half-Life. 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. In September 2008, a group of Ukrainian developers unofficially ported the game to Windows as a modification of the PC version of Half-Life.Show more
user avatarAdded by @Livin86
Vote to bring this game to GOG and help preserve it.
1 353
Trailers and screenshots
Screenshot
Screenshot
Screenshot
Screenshot
Screenshot
Screenshot
Stories about this game (2)
What’s your memory of Half-Life: Decay?Share your favorite moments and see what others remember about this game.
user avatar@placeholder

Make sure to follow our Guidelines when adding new Stories.

If not sure what to write:
  • What made this game unforgettable?
  • Who did you play this game with?
  • What made it fun or challenging?
  • Why do you want this game on GOG?
user avatar@jthyselluser avatar@jthysell
January 31, 2025
This game and story is officially locked on the Playstation 2. It is a 2 player co-op entry in the Half-Life series. There is a fanmade mod that ports this to PC. While it does work (mostly), it is not easy to get it set up for multi-player, which is pretty much required to play the game the way it was meant to be played. It's similar to "A Way Out" and "It Takes Two", but good luck finding someone to play it all the way through with the clunky mods. An official re-release running on a newer engine with online player match-matching would be fantastic treat for Half-Life fans who want more official content and have never been able to experience this story which is part of the canon.
This cant be bought anywhere.
Those games also need your vote!
Indiana Jones' Greatest Adventures
Indiana Jones' Greatest AdventuresIndiana Jones’ Greatest Adventures is a 1994 platform video game released for the Super Nintendo Entertainment System. It is a video game adaptation of the Indiana Jones films Raiders of the Lost Ark (1981), Indiana Jones and the Temple of Doom (1984), and Indiana Jones and the Last Crusade (1989). The game was developed by Factor 5 and published by JVC Musical Industries, Inc. The story is told through cutscenes and text and is mostly faithful to the movies. Its release coincided with that of Super Star Wars: Return of the Jedi, also released by JVC and LucasArts and in the same platform style as the Super Star Wars trilogy. A Sega Mega Drive/Genesis port of the game was apparently completed and ready to be released between summer and autumn of 1995, and was reviewed in GamePro (#73, August 1995, rated 3.5 out of 5.0) and in Germany's GAMERS (November 1995 issue, rated 2 (B Grade). Like many third-party titles near the end of the Genesis' life, however, the game was shelved and was never released. The game was re-released for the Wii's Virtual Console service on November 16, 2009 and in the PAL region on April 23, 2010 for 800 Nintendo Points.
Action
Fantasy
Historical
Action
Fantasy
Historical
104
Rule of Rose
Rule of RoseRule of Rose is a survival horror game in which the player, who controls Jennifer, explores the game environments and furthers the plot by accomplishing tasks and experiencing cut-scenes while sporadically encountering enemies and bosses. Taking place in England in 1930, Rule of Rose centers on Jennifer, a young woman who is led to an abandoned orphanage by a small boy.
Horror
Survival
Horror
Survival
2 688
35
Metal Gear Solid V: Ground Zeroes
Metal Gear Solid V: Ground ZeroesWorld-renowned Kojima Productions showcases another masterpiece in the Metal Gear Solid franchise with Metal Gear Solid V: Ground Zeroes. Metal Gear Solid V: Ground Zeroes is the first segment of the ‘Metal Gear Solid V Experience’ and prologue to the larger second segment, Metal Gear Solid V: The Phantom Pain launching thereafter. MGSV: GZ gives core fans the opportunity to get a taste of the world-class production’s unparalleled visual presentation and gameplay before the release of the main game. It also provides an opportunity for gamers who have never played a Kojima Productions game, and veterans alike, to gain familiarity with the radical new game design and unparalleled style of presentation. The critically acclaimed Metal Gear Solid franchise has entertained fans for decades and revolutionized the gaming industry. Kojima Productions once again raises the bar with the FOX Engine offering incredible graphic fidelity and the introduction of open world game design in the Metal Gear Solid universe. This is the experience that core gamers have been waiting for.
Open world
Action
Science fiction
Stealth
Open world
Action
Science fiction
Stealth
376
1
Metal Gear
Metal GearThe NES version of Metal Gear. It differs from the original MSX2 release in level layout and enemy differences, including an alternative final boss. The game revolves around Solid Snake, an operative of the special forces unit FOXHOUND, who goes on a solo infiltration mission into the fortified state of Outer Heaven to destroy "Metal Gear", a bipedal walking tank capable of launching nuclear missiles from anywhere in the world, as well as rescue a number of fellow agents who have been captured by the enemy.
Action
Action
126
1
Metal Gear Solid V: The Phantom Pain - Collector's Edition
Metal Gear Solid V: The Phantom Pain - Collector's EditionMetal Gear Solid V: The Phantom Pain Collector's Edition Includes: Metal Gear Solid V: The Phantom Pain Game Collectible Steelbook Case Exclusive Packaging Map Half Scale Replica of Snake's Bionic Arm Behind the Scenes Documentary and Trailers Blu-ray Additional Game Content: Customizable 'Venom Snake' Emblem Snake Costume X 4 Cardboard Box X 3 Weapon and Shield Set X 4 MGO Item X 4 XP Boost
Open world
Action
Fantasy
Historical
Stealth
Open world
Action
Fantasy
Historical
Stealth
284
Metal Gear Solid 4: Guns of the Patriots
Metal Gear Solid 4: Guns of the PatriotsMetal Gear Solid 4: Guns of the Patriots is the final canonical Metal Gear game to feature Solid Snake as the main character. The gameplay of the previous games have been kept along with some new features, such as the ability to roll on your back and also to hide in bins scattered around the environment. Most of the story and the relationship between the characters are explained through cut-scenes with a considerable length, so knowledge of the prior games is recommended to fully understand the story. The game also features a complex multiplayer mode entitled Metal Gear Online with some original missions based on the stealth aspects of the single-player games.
Action
Fantasy
Historical
Stealth
Survival
Action
Fantasy
Historical
Stealth
Survival
16 789
18
Metal Gear Solid
Metal Gear SolidMetal Gear Solid is a Game Boy Color spinoff of the popular stealth action game Metal Gear Solid. This is not a port of said game but an original game made specifically for the Game Boy Color. Metal Gear Solid is a non-canon game that serves as an alternate sequel to the events of the original Metal Gear.
Action
Stealth
Action
Stealth
938
Daemon X Machina
Daemon X MachinaDaemon X Machina is a third-person action-shooter game in which players; represented by their avatars called Outers, pilot highly customizable mechs known as Arsenals on missions to suppress various mechanized foes. Choose and equip your Arsenal with a multitude of weapons, obtain more from downed enemy Arsenals, and swap them on the fly to suit your strategy in the face of ever-changing threats.
Action
Science fiction
Action
Science fiction
41
Prey
PreyPrey tells the story of Tommy, a Cherokee garage mechanic stuck on a reservation going nowhere. Abducted along with his people to a menacing mothership orbiting Earth, he sets out to save himself and his girlfriend and eventually his planet.
Our Pick
Top
Action
Science fiction
Our Pick
Top
Action
Science fiction
45 037
79
Metal Gear Survive
Metal Gear SurviveIn a struggle to stay alive on this harsh terrain filled with deadly creatures, soldiers who were previously on Motherbase now must work cooperatively in order to survive.
Action
Science fiction
Survival
Action
Science fiction
Survival
129
1