Half-Life: Decay is the the third expansion pack for the award-winning game, Half-Life. It was included as part of the PS2 version of Half-Life. 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.

It was unofficially ported to PC by a group of Ukrainian developers in 2008.

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Hello again everyone.

This has all been so overwhelming, the reaction to my work has much more incredible than I could ever have anticipated.

My intention was to make something that would reflect what Half-Life meant to me - the horror, the comedy, the action, and the realism of the world around you. Half-Life and it's many community made mods have stuck with me my entire life since I was young and changed the way I looked at games. A lot of the feedback from you all so far seems to show that I might have made some other people remember the same feelings Half-Life brought us when it was first released.

You are all brilliant. All the feedback, videos, reviews, comments have all meant the world to me. Thank you. I dabbled in Half-Life level editing when I was a teenager (sometime around 2000/2001), and never went back to it, but I decided to try my hand at making something worthwhile to release, around five years ago - perhaps spurred on by a lack of Episode 3. A lot has happened in this time - and releasing this marks the end of a long journey for me. The reception I have received has definitely made it all worth while.

I have just released v1.2 - which I hope should fix the last few crashes. A couple of minor bugs may remain, but I no longer have any real time to spend on this aside from fixing issues that prevent it from working - but please do not hesitate to send any issues to me.

On a personal note - I have something to ask. A few months ago, I became a father to the most wonderful little boy in the world. However, when he was born, we found out moments later he had an un-diagnosed heart condition which meant he would not live without immediate open heart surgery. For my wife and I, this was the hardest and most difficult time of our lives, but thanks to the incredible team at the Royal Hospital for Children in Glasgow - he has made a full recovery after surgery and is expected to lead a normal healthy life. There is nothing that can prepare you for this kind of situation, and not everyone is as fortunate as we were.

I would like to ask - if you enjoyed my work and have the means or the inclination - please make a donation to the Glasgow Children's Hospital Charity to support these wonderful people who saved my son's life. Donations will help save, help and enrich the lives of other children.
Glasgowchildrenshospitalcharity.org
Justgiving.com

Thank you, James

Half-Life: Echoes has been released!

Half-Life: Echoes has been released!

News 50 comments

After 20 years of enjoying everything that the Half-Life community has had to offer, I am incredibly happy to finally release my own contribution to you...

Half-Life : Echoes Release Date and Trailer

Half-Life : Echoes Release Date and Trailer

News 49 comments

Playtesting is complete. A release is imminent. Come check out the trailer!

Half-Life : Echoes final polish

Half-Life : Echoes final polish

News 31 comments

A complete version of Echoes is being play-tested for final bug testing and polish. I will be releasing soon.

Help needed

Help needed

News 6 comments

Map developers needed.

Add file RSS Files
Echoes_v1.3.exe

Echoes_v1.3.exe

Full Version 3 comments

Half-Life: Echoes .exe file - Version 1.3 - Requires Windows and the Steam version of Half-Life. This will not be compatible with old saves.

Echoes_v1.3.zip

Echoes_v1.3.zip

Full Version 49 comments

Half-Life: Echoes .zip file - Version 1.3 - Requires Windows and the Steam version of Half-Life. This will not be compatible with old saves.

Echoes_v1.2.exe

Echoes_v1.2.exe

Full Version 4 comments

Half-Life: Echoes .exe file - Version 1.2 - Requires Windows and the Steam version of Half-Life. This will not be compatible with old saves.

Echoes v1.2.zip

Echoes v1.2.zip

Full Version 13 comments

Half-Life: Echoes .zip file - Version 1.2 - Requires Windows and the Steam version of Half-Life. This will not be compatible with old saves.

Echoes v1.1.zip

Echoes v1.1.zip

Full Version 25 comments

Half-Life: Echoes .zip file - Version 1.1 - Requires Windows and the Steam version of Half-Life. This will not be compatible with old saves.

Echoes_v1.1.exe

Echoes_v1.1.exe

Full Version 9 comments

Half-Life: Echoes .exe file - Version 1.1 - Requires Windows and the Steam version of Half-Life. This will not be compatible with old saves.

Comments  (0 - 10 of 20)
headcrabax
headcrabax

Thank you!!!!!! Game like Good job!

Reply Good karma Bad karma+1 vote
★HECU★
★HECU★

Where button download

Reply Good karma Bad karma+1 vote
elek2008
elek2008

How do I host a server?

Reply Good karma Bad karma+1 vote
Cdm966
Cdm966

Ahhh. Nostalgia. :)

Reply Good karma Bad karma+4 votes
xxx3456789
xxx3456789

I Play The PC Decay...

Reply Good karma Bad karma+5 votes
kenter
kenter

I remember playing this on PS2.

Reply Good karma Bad karma+4 votes
AymericTheNightmare
AymericTheNightmare

Yeah, me too. But quite hard in singleplayer.

Reply Good karma Bad karma+2 votes
overwatchprivate
overwatchprivate

i want to play this so badly. Ive played every half life single and multiplayer except this one

Reply Good karma Bad karma+6 votes
SpeedyClaude
SpeedyClaude

is there singleplayer support for decay???
Or a bot sistem

Reply Good karma Bad karma+4 votes
tschumann
tschumann

Yes, the mod comes with a bot.

Reply Good karma Bad karma+4 votes
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Half-Life: Decay
Platforms
PS2
Developer
Gearbox Software
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GoldSource
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Sci-Fi
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Multiplayer
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AAA
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Half-Life: Opposing Force
Half-Life: Opposing Force First Person Shooter
Half-Life: Blue Shift
Half-Life: Blue Shift First Person Shooter
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