Synergy is a Half-Life 2 co-opertive multiplayer modification. We have evolved from multiple mods (DC Co-op 2, Dev Co-op and Tim-Coop) to offer you the greatest co-op experience. This modification strives to give Half-Life players a true Half-Life 2 cooperative experience. The mod features our own levels and the ability to play the Half-Life 2, Episode One and Episode Two campaigns co-operatively. In addition, you can add more content by installing third-party mods, such as ROCK 24 and MINERVA: Metastasis, then playing them in Synergy!

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Hard-Life : Office Complex Beta Video

Hard-Life : Office Complex Beta Video

News 13 comments

Hard-Life Office Complex game play video showing new features. Video may contain possible bugs that will be addressed in future. It is only to show progress...

Synergy Update #44

Synergy Update #44

News 5 comments

Updates to Synergy have been made public on Steam! Version #44 is out! Old Synergy content has been restored!

Synergy Version 28 Live

Synergy Version 28 Live

News 2 comments

Another update for Synergy! New characters for Donors and many bug fixes!

The FINALLY!!1 Update

The FINALLY!!1 Update

News 15 comments

Finally! Actual UPDATE to Synergy, the cooperative mod for Half-Life 2!

Oh, yeah! remember that mod?

Oh, yeah! remember that mod?

News 11 comments

Yeah, We are back. This time its actually working out between team members and everything is looking up.

"Still Alive..."

"Still Alive..."

News 17 comments

A small update released that includes an updated map.

Transmission 16433

Transmission 16433

Feature 19 comments

This week William and Thomas discuss the L4D info from PAX; This weeks TF2 updates; Cooldiradical; Synergy’s City 7 support and autosaves; Resistance...

Synergy Update - Version 14 Released

Synergy Update - Version 14 Released

News

This is a news update to inform you that our latest version has gone public - version 14! Head over to synergymod.net for details!

Synergy Update

Synergy Update

News 3 comments

Version 11 of Synergy is now on Steam! Check the change log at our website!

Synergy Update on Steam

Synergy Update on Steam

News 16 comments

Synergy Update available NOW on Steam! This update fixes many map bugs, as well as in the code. For more information, check our forums.

Mods Get Steam'd

Mods Get Steam'd

Feature 71 comments

The first Source-powered mods to be distributed via Steam will be released Thursday, October 2nd.

Mods + Steamworks : The story so far...

Mods + Steamworks : The story so far...

Feature 76 comments

Mods are finally getting invited onto Valve's digital distribution platform.

Synergy (OB) on Friday

Synergy (OB) on Friday

News 19 comments

Synergy (Orange Box) will be released on Friday, August 15, 2008!

Synergy Update News

Synergy Update News

News 7 comments

First official update news on the new version of Synergy on the Orange Box SDK.

Synergy version 1.1 Released

Synergy version 1.1 Released

News 3 comments

Synergy version 1.1 released today. This version enables you to play Half-Life 2: Episode One!

Synergy 1.1 News

Synergy 1.1 News

News 6 comments

Synergy version 1.1 will be available on Friday (January 11th, 08).

Synergy Release 1.0 Update

Synergy Release 1.0 Update

News 7 comments

Synergy version Release 1.0 is now available to the public for download!

Synergy Release 1.0 News

Synergy Release 1.0 News

News 7 comments

Synergy Release 1.0 will be available to the public on December 7, 2007!

Synergy Beta 2.6 Released

News

Synergy Beta 2.6 has finally officially been released. There are a few things that have been changed; you can't heal yourself with the PDHVs anymore...

Synergy Beta 2.6 Coming Soon!

Synergy Beta 2.6 Coming Soon!

News 4 comments

Synergy Beta 2.6 now has an official release date: Friday, October 26, 2007! This version of Synergy will feature the full Half-Life 2 singleplayer campaign...

Synergy Beta 2.5 Released

Synergy Beta 2.5 Released

News 2 comments

Synergy Beta 2.5 has officially been released! (Slight delay but nothing to worry about!) Another one of Stino's maps will be included with this...

Synergy Beta 2.5 News

Synergy Beta 2.5 News

News 3 comments

Alright guys, we now have a release date for Beta 2.5: August 17th 1:00 PM GMT! (That's THIS Friday!) This version will feature some new things...

Synergy Beta 2.5 Update

Synergy Beta 2.5 Update

News 3 comments

I've got a big update for everyone! Please welcome Magic Ninja to the Team - he'll be making some great maps for us, like the one seen below...

Synergy Beta 2.4 Released

Synergy Beta 2.4 Released

News 3 comments

It's finally Friday - which means it's time to release Synergy Beta 2.4 to the public! Get on over to the Files page and download right away...

Synergy Beta 2.4 News

Synergy Beta 2.4 News

News 2 comments

Synergy Beta 2.4 is complete now and will be released to the public this coming Friday, April 27th, 2007! A complete list of changes can be found on the...

Synergy 2.3 Release (Full/Patch)

Synergy 2.3 Release (Full/Patch)

News

It's release time again; Beta 2.3 is now complete - featuring many bug fixes, updated components (such as the life system and optimized MCF code...

Synergy Beta 2.3 Update

Synergy Beta 2.3 Update

News

Alot of work has been put into Synergy Beta 2.3 and we're finally ready for a release this Friday (March 2nd)! Many bugs have been fixed making Synergy...

Synergy Beta 2.2 Release

Synergy Beta 2.2 Release

News 2 comments

Synergy Beta 2.2 has been released! This version updates users from Beta 2.1 and includes the new level class system, player pain sounds, new NPCs, bug...

Synergy Beta 2.2 Update

Synergy Beta 2.2 Update

News 1 comment

Progress Update! I am proud to announce that Beta 2.2 is coming along very nice, stable and fairly quickly. A bunch of new things have been added too...

Synergy Beta 2.1 Release

News

Synergy Beta 2.1 has been released. You can get it on the Files page, as I am writing this we are still uploading to other websites, so please be patient...