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 (87 reviews) - 95% of the 87 user reviews in the last 30 days are positive.
Overall:
Very Positive (2,936 reviews) - 94% of the 2,936 user reviews for this game are positive.
Release Date: Sep 1, 2005

Sign in to add this item to your wishlist, follow it, or mark it as not interested

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 (87 reviews)
Overall:
Very Positive (2,936 reviews)
Recently Posted
Medusa Head
( 50.0 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
͡°) ͜ʖ ͡(°
( 37.8 hrs on record )
Posted: May 2
This is simply amazing.

It's amazing that such a mod can make a 2004 game so much more fun.

Thank you very much.
Helpful? Yes No Funny
Hobo Joe
( 11.0 hrs on record )
Posted: May 2
It's a great mod that allows me to play hl2 games with ma friendz. No lag, no problems at all. Overall brilliant.
Helpful? Yes No Funny
Spooky Ghosties
( 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
Helpful? Yes No Funny
Nathanimall
( 30.2 hrs on record )
Posted: May 1
me and friends just do races to the end of HL2
Helpful? Yes No Funny
t3h d00d
( 4.1 hrs on record )
Posted: April 30
eeehhhhhh its pretty good
Helpful? Yes No Funny
ßᴀҡᴀı ( Ban Me From CSGO )
( 45.8 hrs on record )
Posted: April 28
Half life 2... but with friends ;)
Helpful? Yes No Funny
Tim
( 2.1 hrs on record )
Posted: April 27
Language error x.x
Helpful? Yes No Funny
xllVllx
( 27.8 hrs on record )
Posted: April 27
This is such a good idea but such a small community.
Helpful? Yes No Funny
GOODBYE SHELLBY
( 10.1 hrs on record )
Posted: April 25
This game is a really good one, and if you play Team Fortress 2 you know how fun multiplayer can be
Helpful? Yes No Funny
Aardonyx
( 6.8 hrs on record )
Posted: April 22
A great way to play Half-Life 2 with friends!
Helpful? Yes No Funny
JoostBuis
( 5.0 hrs on record )
Posted: April 19
Half life 2 is a fun and inovative game ( give us half life 3 gaben you ♥♥♥♥ ) but theres no co-op campaign , untill now . synergy pretty much allows you and your mates to play the half life 2 story together and other custom maps , that you will imediatly regret playing as either they are way to ♥♥♥♥in hard 9 or im just ♥♥♥♥ at hl2 combat) or the map is sooo ♥♥♥♥in bad you'll wish you parent's aborted you . So that pretty much sums up this game , also its only worth playing if you have actual freinds that will want to play with you , if you dont or your friend think your a a ♥♥♥♥in ♥♥♥♥♥♥ then thats your problem not mines , go get some friends ya loser .

Defo worth platying WITH FRIENDS and papa bless those with friends every one else go be a weaboo and KYS.
Helpful? Yes No Funny
Scooby[FR]
( 12.7 hrs on record )
Posted: April 18
They forgot the friend dlc.
Helpful? Yes No Funny
Parkie
( 59.0 hrs on record )
Posted: April 17
awesome
Helpful? Yes No Funny
bananaleafer
( 21.0 hrs on record )
Posted: April 16
''HELP!!!!HOLY CRAP HELP!!!!!'' ~Rebel

Best voice commands & mod ever 10/10,would cry for help again.
Helpful? Yes No Funny
OGBearbear
( 4.0 hrs on record )
Posted: April 15
pretty good
Helpful? Yes No Funny
Mawgan
( 27.5 hrs on record )
Posted: April 12
This is amazing! I went and drove my airboat with my friend and then shot some people. I then felt like driving my jeep along beach with all the creatures attacking me and my friend. Finaly I decided to go home and play some Synergy. I had lots of fun. 11/10 would be a rebel again.
Helpful? Yes No Funny
Most Helpful Reviews  In the past 30 days
1 of 1 people (100%) found this review helpful
Recommended
20.2 hrs on record
Posted: April 11
Family uses to mess around with commands and have death matches
Was this review helpful? Yes No Funny
1 of 1 people (100%) found this review helpful
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
1 of 1 people (100%) 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
1 of 1 people (100%) found this review helpful
Recommended
50.0 hrs on record
Posted: May 4
HOLY CRAP! HEEEEEELP!!!
Was this review helpful? Yes No Funny
1 of 2 people (50%) found this review helpful
Recommended
7.7 hrs on record
Posted: April 4
do you like half life?
do you like muiltiplayer?

yes?

get this right the ♥♥♥♥ now!
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
Recommended
69.4 hrs on record
Posted: March 8
My favorite Half-Life 2 modification.
Was this review helpful? Yes No Funny
4 of 5 people (80%) found this review helpful
5 people found this review funny
Recommended
0.4 hrs on record
Posted: February 10
-russians join server
-wont leave
-call you noob

♥♥♥♥ blyat
10/10
Was this review helpful? Yes No Funny
2 of 2 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
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
9.4 hrs on record
Posted: February 15
thx for this mod. best coop and play with friends.
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
98.5 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
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
1 of 1 people (100%) found this review helpful
1 of 1 people (100%) found this review helpful
Recommended
9.0 hrs on record
Posted: February 13
10/10 the name has nothing to do with the mod
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
2 of 3 people (67%) found this review helpful
1 person found this review funny
1 of 2 people (50%) found this review helpful