Synergy is a simple Half-Life 2 Modification (Mod) that enables you to play through the Half-Life 2 series and many other 3rd-party campaigns cooperatively with friends.
User reviews:
Recent:
Very Positive (65 reviews) - 95% of the 65 user reviews in the last 30 days are positive.
Overall:
Very Positive (2,960 reviews) - 94% of the 2,960 user reviews for this game are positive.
Release Date: Sep 1, 2005

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Community-Made Mod

This game requires that you own Half-Life 2.

Click here to learn more about mods on Steam.

Install Synergy

Half-Life 2 Mod

 

About This Game

Synergy is a simple Half-Life 2 Modification (Mod) that enables you to play through the Half-Life 2 series and many other 3rd-party campaigns cooperatively with friends.

Supported Games:

System Requirements

Windows
Mac OS X
SteamOS + Linux
    Minimum
    OS: Windows® 7 (32/64-bit)/Vista/XP
    Processor: 1.7 GHz Processor (Requires support for SSE2)
    Memory: 512MB RAM
    DirectX: DirectX® 8.1
    Hard Drive: 1 GB available space
    Sound Card: DirectX Compatible
    Network: Broadband Internet connection
    Recommended
    OS: Windows® 7 (32/64-bit)/Vista/XP
    Processor:Pentium 4 processor (3.0GHz, or better) (Requires support for SSE2)
    Memory: 1GB RAM
    DirectX: DirectX® 9
    Minimum
    OS: OS X Mountain Lion 10.8
    Processor: 1.7 GHz Processor
    Memory: 1GB RAM
    Graphics: NVIDIA GeForce 8 or higher, ATI X1600 or higher, or Intel HD 3000 or higher
    Hard Drive: 1 GB available space
    Network: Broadband Internet connection
    Minimum
    OS: Ubuntu 12.04, SteamOS
    Processor: 1.7 GHz Processor
    Memory: 1GB RAM
    Graphic Card: NVIDIA GeForce 8 or higher, ATI X1600 or higher, or Intel HD 3000 or higher
    Hard Drive: 1 GB available space
    Sound Card: OpenAL Compatible Sound Card
    Network: Broadband Internet connection
Customer reviews
Customer Review system updated! Learn more
Recent:
Very Positive (65 reviews)
Overall:
Very Positive (2,960 reviews)
Recently Posted
Hash Myth
( 5.4 hrs on record )
Posted: May 22
Product received for free
Pro's : Can play HL2 with friends or what not as co-op.

Cons : If you do not have all the HL2 saga (Half-Life 2: Episode One & Two) Most of the Synergy co-op maps will not load
Playing some maps on a hard mode will sometimes crash or become impossible to play.
Some maps will let you know what is missing and won't load but others will crash to desktop.
Helpful? Yes No Funny
Trigger Jones
( 19.9 hrs on record )
Posted: May 22
broken as ♥♥♥♥ on hard mode
Helpful? Yes No Funny
Ccsdkb
( 54.3 hrs on record )
Posted: May 22
Great mod half life that allows you play with friends. Several different maps and the own half life
Helpful? Yes No Funny
Chumsworth
( 1.3 hrs on record )
Posted: May 18
Probably the (2nd) best hl2 mod out there. Really gives me that sven coop nostalgia.
Helpful? Yes No Funny
jeremy
( 18.2 hrs on record )
Posted: May 16
Product received for free
i like this game this game gives cool stuff half life even it has multiplayer to you can discover cool things with other people
Helpful? Yes No Funny
ColaCoon
( 4.5 hrs on record )
Posted: May 15
Product received for free
This is the best fallout game I have ever played.
Helpful? Yes No Funny
chesse20
( 21.4 hrs on record )
Posted: May 15
sv-en coop rip Off
Helpful? Yes No Funny
_LOL_Quietman
( 390.8 hrs on record )
Posted: May 15
It's a cool mod that allows you to play source games like Half Life 2 and puzzle maps with other people. Just a pity that the servers crash a lot.
Helpful? Yes No Funny
♥ FrostBiTE ♥
( 82.3 hrs on record )
Posted: May 14
Product received for free
I Like it...
Helpful? Yes No Funny
_Eden
( 4.0 hrs on record )
Posted: May 13
Product received for free
Finally something that I can play HL2 with my friends!
Helpful? Yes No Funny
Snivo
( 23.8 hrs on record )
Posted: May 13
Hello,

If you were interest by playing Half Life 2 but wanted share the experience with some friends this is definitly made for you then !

Since the beginning the mod have been improve alot, they fix alot of bugs and now its really stable !

I never have that much fun by playing Half Life 2 ! 10/10
Helpful? Yes No Funny
Amazing_Flamingo
( 3.4 hrs on record )
Posted: May 10
Product received for free
Awesome, its great BUT u must have the game... If ur friend owns that game than just download the game from them. Than with this, u can pla for free for owever long uw ant while they play with u . U won't be kicked off since u are noton teir game too. Get (Sven Co-Op) too, its the 1st one and u DON'T need half-life 1 fo sven. It comes with the game for free! AMAZING!!!!
Helpful? Yes No Funny
FoxyThePirateFox
( 39.4 hrs on record )
Posted: May 7
"a ♥♥♥♥♥' AWESOME Half-Life 2 Modification...
...you know why? IT NOW HAS CO-OP."


~FoxyThePirateFox




Helpful? Yes No Funny
JONTTU1337
( 0.1 hrs on record )
Posted: May 7
Product received for free
13/37
Helpful? Yes No Funny
{Gx7}Turbo
( 2.8 hrs on record )
Posted: May 6
Very good 1 thing I would suggest is if you they had two sweater airboats and jeeps
Helpful? Yes No Funny
Scrummy Bingus
( 19.1 hrs on record )
Posted: May 6
Product received for free
Crashes all the time, really not worth rebooting it up.
Helpful? Yes No Funny
ThunderClash45
( 11.4 hrs on record )
Posted: May 4
Product received for free
Honestly a game that really re-invents half life.
Helpful? Yes No Funny
Medusa Head
( 64.1 hrs on record )
Posted: May 4
HOLY CRAP! HEEEEEELP!!!
Helpful? Yes No Funny
sep11insidejob
( 5.9 hrs on record )
Posted: May 3
Thank you for doing this. Recommended big time!
Helpful? Yes No Funny
Most Helpful Reviews  In the past 30 days
5 of 5 people (100%) found this review helpful
1 person found this review funny
Recommended
11.4 hrs on record
Posted: May 4
Product received for free
Honestly a game that really re-invents half life.
Was this review helpful? Yes No Funny
3 of 3 people (100%) found this review helpful
2 people found this review funny
Recommended
5.9 hrs on record
Posted: May 3
Thank you for doing this. Recommended big time!
Was this review helpful? Yes No Funny
2 of 2 people (100%) found this review helpful
Recommended
23.8 hrs on record
Posted: May 13
Hello,

If you were interest by playing Half Life 2 but wanted share the experience with some friends this is definitly made for you then !

Since the beginning the mod have been improve alot, they fix alot of bugs and now its really stable !

I never have that much fun by playing Half Life 2 ! 10/10
Was this review helpful? Yes No Funny
2 of 2 people (100%) found this review helpful
Recommended
1.3 hrs on record
Posted: May 18
Probably the (2nd) best hl2 mod out there. Really gives me that sven coop nostalgia.
Was this review helpful? Yes No Funny
3 of 4 people (75%) found this review helpful
Recommended
64.1 hrs on record
Posted: May 4
HOLY CRAP! HEEEEEELP!!!
Was this review helpful? Yes No Funny
3 of 4 people (75%) found this review helpful
3 people found this review funny
Recommended
13.6 hrs on record
Posted: May 1
My first time playing and i join a server, we're on the chapter water hazard, and everyone immediatley yells at me.



10/10 would play again
Was this review helpful? Yes No Funny
3 of 4 people (75%) found this review helpful
Recommended
45.8 hrs on record
Posted: April 28
Half life 2... but with friends ;)
Was this review helpful? Yes No Funny
4 of 7 people (57%) found this review helpful
6 people found this review funny
Recommended
0.1 hrs on record
Posted: May 7
Product received for free
13/37
Was this review helpful? Yes No Funny
1 of 2 people (50%) found this review helpful
Most Helpful Reviews  In the past 90 days
3 of 3 people (100%) found this review helpful
1 person found this review funny
Recommended
9.2 hrs on record
Posted: April 10
You can play HL2 with your friends. It's difficult.
Was this review helpful? Yes No Funny
3 of 3 people (100%) found this review helpful
Recommended
3.6 hrs on record
Posted: March 4
It is really fun to be able to play with friends on one of the best FPS games created ever. Noe that you can get addons to it, it became even more enjoyable
Was this review helpful? Yes No Funny
3 of 3 people (100%) found this review helpful
Recommended
79.9 hrs on record
Posted: March 8
My favorite Half-Life 2 modification.
Was this review helpful? Yes No Funny
3 of 3 people (100%) found this review helpful
2 people found this review funny
Recommended
22.8 hrs on record
Posted: March 12
Half Life 2 Coop ~ Synergy : Teamworking and survivability to the top of your notebook.
and as you also get the view and feel for how the Rebel and Civilians have without the H.E.V Suit.
I have now also discovered fields of trolling within this mod by becomming the troll.. sorry

EDIT; I've discovered the Complete art of trolling in synergy and i'm not sorry anymore!

Note: if you see me then it's best that you leave, i'm a real b!tch to everyone on the server.

Half Life 1 Coop ~ Sven Coop :
Overpowered Enemies that squashes you to Strawberry Jam faster than the Toast pops up.
Team mates trolling around with players and getting mauled by stupidity.
Puts the 'How-long-until-im-dead-again' to the maximum usage.

Try Both Mods, they're highly recommended!
Also you better play all Half-Life 1 games to know the layout and feel for Sven-Coop
And play all Half-Life 2 games to know the layout and feel for Synergy.

Both are very challanging but Sven Coop sometime can be very hard, depends on map.
Was this review helpful? Yes No Funny
2 of 2 people (100%) found this review helpful
1 person found this review funny
Recommended
23.7 hrs on record
Posted: April 11
Family uses to mess around with commands and have death matches
Was this review helpful? Yes No Funny
2 of 2 people (100%) found this review helpful
1 person found this review funny
Recommended
2.0 hrs on record
Posted: March 19
if you can't bhop gg
Was this review helpful? Yes No Funny
2 of 2 people (100%) found this review helpful
Recommended
103.7 hrs on record
Posted: March 9
This is a great mod! Lots of servers and often players online,
but it tends that not that many play synergy so its not often you see a server
with over 10 players actively.

There is minor bugs at times but it works great. I love that you can play with your friends
but not everybody of you're friends have Half-Life or Gmod so it can be hard to convince
them to get the games. This is to be expected since this is a mod and not its own game.

9.5/10 -I recommend you check out this game and try it for a bit!
Was this review helpful? Yes No Funny
1 of 1 people (100%) found this review helpful
Recommended
21.1 hrs on record
Posted: February 27
Hilariously good fun. Can get out of control quickly with friends.
Was this review helpful? Yes No Funny
1 of 1 people (100%) found this review helpful
Recommended
18.3 hrs on record
Posted: February 28
Its fun when you play with your friends.
I like this modification.
Was this review helpful? Yes No Funny
1 of 1 people (100%) found this review helpful
Recommended
4.4 hrs on record
Posted: March 30
really awesome but i wish i had friends
Was this review helpful? Yes No Funny
1 of 1 people (100%) found this review helpful
1 person found this review funny
Recommended
78.7 hrs on record
Posted: April 7
I'm rewriting my review.



I have not played in a long time, but I've had many good memories with it. I met some people on my friend's list (Some who have sadly stopped using steam or disapeared for reasons unknown).
Redownloading and playing more.
Was this review helpful? Yes No Funny