Synergy is a community made mod for Half-Life 2 that allows you to play through the campaigns with your friends:

• Half-Life 2
• Half-Life 2: Episode 1
• Half-Life 2: Episode 2

Re-live the epic adventure/nightmare as Gordon Freeman against the Combine republic! Experience silly gravity bugs and interesting effects while solving puzzles and goofing off with the gravity gun! Its endless fun!



There are a few progress-breaking bugs in Synergy and the only solution is to skip the rest of "said map" but over all the experience is really fun and long! So many enemies to kill and fun ways to crash into each other in the buggy or hovercraft. Proton handles Synergy nicely! Its hard to tell if Half-Life is running natively or as Winodws executables?

I played through with both of my daughters offline with a single Steam account and it was a lot of fun! Thank you Synergy!

Mint 20.3 64-bit
GeForce GTX 1650
Nvidia 515
Proton Experimental