The Synergy team has released an updated version of this Half-Life 2 mod, enabling you to play Half-Life 2: Episode One cooperatively. Visit this page for details.

Synergy R 1.1 for Windows (185.07MB)

Synergy R 1.1 Patch for Windows (4.17MB)

Synergy R 1.1 Patch for Linux (11.05MB)