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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About Half-Life : Echoes with 27 comments by MrGnang on Mar 6th, 2014

After 15 years of enjoying Half-Life, and the endless user-created content over those years, I wish to give back to the community and create my own take on the Black Mesa Incident...

After dabbling with Half-Life mapping well over 10 years ago and never releasing anything (aside from this short silly little thing called Operation Randomosity, still lurking out there somewhere), I finally decided to create something worthwhile that other people could enjoy.

Being the massive Half-Life fan that I am, I wished to create something that would fit into the existing mythos as well as staying true to the fiction. All I can give away is that this storyline begins with you playing the part of Candidate #12. You arrive at the Black Mesa Complex for another day of work - on the day that everything changed forever!

It is still in very early stages but progress has been great, and I would like to share this progress in the media below! Thank you for all who have contributed to the Half-Life universe, as well as that of any other game! You are what makes gaming great.

The first chapter is called FOUNDATION.

I hope to keep you all regularly updated! Thank you for viewing my work :)

- James

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Hev charger and healt charger from half life decay
Half-Life

Hev charger and healt charger from half life decay

Sep 14, 2014 Half-Life Prop Model 6 comments

those 2 models with they're animations, they're not made by me, they have animations and a retexture could make them look better, but im not going to...

Half-Life Uplink
Half-Life

Half-Life Uplink

Jun 16, 2014 Half-Life Demo 4 comments

This is one of the two demos released for Half-Life. The first one, called Day One, was just shipped with certain video cards and never released to the...

Half-Life Unofficial FAQ
Half-Life

Half-Life Unofficial FAQ

May 9, 2014 Half-Life Other 0 comments

I have found this Unofficial FAQ on an archived Half-Life website.

Further-Data
Half-Life

Further-Data

Apr 1, 2014 Half-Life Patch 3 comments

This is Further-Data, a small bonus CD released for free in 1999 via retail channels to Half-Life players. It contains bonus audio and music, lots of...

Prefabs Pack
Counter-Strike

Prefabs Pack

Dec 30, 2013 Counter-Strike Prefabs 2 comments

A large zip file containing all prefabs downloaded from the Prefab Lab (the site has been shut down in 05-10-2002) since 5/1/1999. This pack contains...

Half Life Decay
Half-Life

Half Life Decay

Dec 26, 2013 Half-Life: Decay Full Version 16 comments

Half-Life: Decay is an add-on included in the PlayStation 2 port of the first-person shooter computer game Half-Life, developed by Gearbox Software and...

Post comment Comments  (0 - 10 of 16)
Cdm966
Cdm966 Aug 28 2012, 2:43pm says:

Ahhh. Nostalgia. :)

+4 votes     reply to comment
xxx3456789
xxx3456789 Jul 30 2012, 10:33pm says:

I Play The PC Decay...

+4 votes     reply to comment
kenter
kenter Feb 29 2012, 4:34pm says:

I remember playing this on PS2.

+4 votes     reply to comment
AymericTheNightmare
AymericTheNightmare Nov 29 2012, 9:37am replied:

Yeah, me too. But quite hard in singleplayer.

+2 votes     reply to comment
overwatchprivate
overwatchprivate Jan 9 2012, 5:59pm says:

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

+4 votes     reply to comment
SpeedyClaude
SpeedyClaude Apr 21 2011, 11:50am says:

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

+4 votes     reply to comment
tschumann
tschumann May 30 2011, 11:02pm replied:

Yes, the mod comes with a bot.

+4 votes     reply to comment
AmaroqDricaldari
AmaroqDricaldari Apr 13 2011, 12:52pm says:

If only Valve had it officially ported to PC and Mac and if there was a Singleplayer component.

+9 votes     reply to comment
RangerC
RangerC Mar 19 2011, 5:10am replied:

250kb.com

Here is one who has the resolution of a default ModDB banner.

+3 votes     reply to comment
ytres
ytres Mar 22 2011, 12:01am replied:

Still stretched... I suck at creating banners, so if someone can make me a nice one (950x150), please do so.

+4 votes     reply to comment
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Half-Life: Decay
Platform
PS2
Developer
Gearbox Software
Engine
GoldSource
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Release Date
Released Nov 14, 2001
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9.3

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Style
Genre
First Person Shooter
Theme
Sci-Fi
Players
Multiplayer
Project
AAA
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Expansion Pack
This game is an expansion for Half-Life
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More Expansions
Half-Life: Blue Shift, Released Jun 11, 2001
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Half-Life: Opposing Force, Released Oct 30, 1999
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