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.

  • View media
  • View media
  • View media
  • View media
  • View media
  • View media
Post article RSS Articles

Next batch of additions to Half-Life Beyond is here!

As this year draws to a close we wanted to take a moment to talk about more of the progress so far so let's take a look at some of it below!

We've expanded the graphical settings menu with more options, such as resolution scale and the option to turn off motion blur. FOV slider has been moved to the gameplay options tab since it is more related to the player's view. The game will now also auto adjust the settings to best suit your current hardware upon launching it for the first time!

GraphicsOptions


We implemented Logo Sprays with the addition of being able to change their color to any color you want rather than just having preset color options, and added a new type of animated sprays: 2 animated sprays are currently available and can be obtained by completing challenges tied to them in the Extras menu! Skin preview recieved a minor visual update aswell.


Various details have also been added or tweaked further, like Suit Modification Station's "flames" effect, and made parts of weapons emit light where it makes sense.

Emit GaussEmit Rocket


Also added a notification to the right side of your screen whenever you complete a challenge, followed by a sound effect that temporarily reduces the volume of the other sound effects


And plenty of QoL improvements like faster to use Suit Mod Stations, oversights fixed and more! and a little Holiday themed extra that will last up until next year. Happy Holidays!

Recruiting

Interested in making your own content for the game? check out our open dev positions and see which ones interest you the most!

December 2023 - Current Roadmap Update

December 2023 - Current Roadmap Update

News

A quick overview of the actual development roadmap until the first release.

Half-Life : Echoes Release - Thank you

Half-Life : Echoes Release - Thank you

News 23 comments

A massive thank you to everyone who played and enjoyed my mod.

Half-Life: Echoes has been released!

Half-Life: Echoes has been released!

News 52 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 47 comments

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

Add file RSS Related Files
Half-Life: Decay v1.024 Full (Re-Uploaded)

Half-Life: Decay v1.024 Full (Re-Uploaded)

Half-Life: Decay v1.02 Full Version 1 comment

This is Full version of Half-Life: Decay - v1.024. Patch version were uploaded on gamebanana (Link in a mod's description). This is the re-uploaded due...

Half-Life: Decay v1.023 Full

Half-Life: Decay v1.023 Full

Half-Life: Decay v1.02 Full Version 1 comment

This is Full version of Half-Life: Decay - v1.023 (Patch version were uploaded on gamebanana).

Half-Life Unified SDK Map Decompiler

Half-Life Unified SDK Map Decompiler

Mapping Tool

Half-Life Unified SDK Map Decompiler by SamVanheer - is a powerful tool used to decompile Half-Life 1 BSP version 29 and 30 files. It stands out from...

Half-Life: Decay v1.022 Full

Half-Life: Decay v1.022 Full

Half-Life: Decay v1.02 Full Version 7 comments

Full and patched version of Half-Life: Decay v1.022.

Half-Life: Decay v1.021 Full

Half-Life: Decay v1.021 Full

Half-Life: Decay v1.02 Full Version 2 comments

Full, cleaned and patched version of Half-Life: Decay v1.021 (in case if patch will not work well).

Half-Life: Decay v1.021 Patch

Half-Life: Decay v1.021 Patch

Half-Life: Decay v1.02 Patch

Major patch for fix most of the bugs of Half-life: Decay.

Comments  (0 - 10 of 24)
BionicCoyote
BionicCoyote

Full playthrough of the PC port w/ TheRenegadist and myself

Reply Good karma Bad karma0 votes
bxigxy
bxigxy

i agree

Reply Good karma Bad karma+2 votes
LevTaylor
LevTaylor

I think Decay deserves more love and also a brand new updated PC Port ;^)

Reply Good karma Bad karma+3 votes
jonatasv
jonatasv

james good morning, my name is jonatas moro in brazil, and recently every day I play your hl decay with my brother on my ps2, thanks to you, I am very happy when I play this marvel of universe half life.
I come to thank you for what made this game changed my life,
I hope that someday an unofficial port of opposing force can be released for ps2.
God bless you and your family.
THANK YOU

Reply Good karma Bad karma0 votes
heady123
heady123

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

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

Where button download

Reply Good karma Bad karma-1 votes
elek2008
elek2008

How do I host a server?

Reply Good karma Bad karma+1 vote
Cdm966
Cdm966

Ahhh. Nostalgia. :)

Reply Good karma Bad karma+5 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+5 votes
AymericTheNightmare
AymericTheNightmare

Yeah, me too. But quite hard in singleplayer.

Reply Good karma Bad karma+3 votes
Post a comment
Sign in or join with:

Only registered members can share their thoughts. So come on! Join the community today (totally free - or sign in with your social account on the right) and join in the conversation.

X