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 published in October of 2001, now being remade by independend Ukrainian developers for PC with the help of other european developers/fans.

Our team is working on straight port of this game to PC! "Decay PC"'s active development began in mid-October of 2005 and release is scheduled to be somewhere in Summer of 2008.

Like Gearbox's other expansion packs Opposing Force and Blue Shift, Decay returns to the setting and timeline of the original story, but with different player characters: two female colleagues of Gordon Freeman, Dr. Gina Cross and Dr. Colette Green, who both take part in the Anomalous Materials laboratory experiment - they make preparations for the experiment under the Test Chamber such as monitoring Anti-Mass spectrometer and delivering anomalous materials to Dr. Freeman. When disaster happens both women together with their collegues Dr. Rosenberg and Dr. Keller try to save personell of the facility and reverse the resonance cascade to seal the dimensional rift.

For more information please visit official site of the project.

Non-public beta version of the project was realesed dec. 31, 2007

video of first level (above) , played on beta 1 (12/31/07)

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Secret Level menu 10

Hello, This Is My First Post. Heres Some International posted news about decay:Planet Half-life halflife2.net half-life falloutRock, Paper And Shotgun CS-Nation Half-LIfe Inside Trgamer Half-Life2.skAdded By BarnzAnd Also Half Life Decay Was Realesed at 25 septemberIt Happened Where Officialy Realesed Half Life Decay Pc Port!You Can Download The Game At Our Website s Download Page

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Download the Half Life Decay game

4 years ago Other 3 comments Report

Open this tutorial to get Half Life Decay link and download it.

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Half Life Decay

Half Life Decay

1 year ago Full Version 19 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...

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DimanGamer Aug 26 2015 says:

Really nice mod

+2 votes     reply to comment
rea987 Mar 21 2015 says:


I prepared an installation and running guide for GNU/Linux. Enjoy! ;-)


+3 votes     reply to comment
rea987 Feb 10 2015 says:

I partially managed the mod to run on GNU/Linux by copying hl.so from /Half-Life/valve/dlls to /Half-Life/decay/dlls and adding gamedll_linux "dlls/hl.so" line to liblist.gam in /Half-Life/decay. However the game rejects to join any internet servers. When I try to play the game as single player, it starts but fails to load second player and NPCs, unable to switch between players; so it is not possible to proceed. The mod/game needs some sort of decay.so to function on Linux properly.

+1 vote     reply to comment
cryptid85 Aug 12 2014 says:

No Mac or Linux :(

+1 vote     reply to comment
jeremydog May 22 2014 says:

i know it's probably a pain to do, but could you make a version where you don't have to keep switching players?

+2 votes     reply to comment
Justiceiro Jun 10 2014 replied:

Could have added barney's AI to co-star (shoot and follow), while he was not being controlled

+3 votes     reply to comment
Sepp4Ever Jan 26 2014 says:

It wont launch.HELP!!

+1 vote     reply to comment
chris_paul Jan 2 2014 buried:



-10 votes     reply to comment
FirstaidGames Jul 11 2014 replied:

Don't be a douchebag chris

+3 votes     reply to comment
Maddog100 Oct 27 2013 says:

And in story mode, I only play with one character, so I can't even go to the dressing room.

+2 votes     reply to comment
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Half-Life Icon
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Release Date
Released 2008
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154 votes submitted.

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Highest Rated (2 agree) 10/10

Good addon with cool gameplay, atmosphere, design and plot.

Jun 8 2012 by ildarion

Lowest Rated (2 agree) 3/10

this was to be fantastic if the history made any sence =P

Jul 13 2009 by bluluxabica

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3 years ago
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