The classic cooperative mod for Half-Life 2 has been updated. Synergy is one of the few prestigious mods to get a Steam release and the continued support for it from its dedicated team of developers shows why it was one of the mods Valve picked. Whimsically called the “The Finally!!1 Update”, this update is contains various bug fixes to improve the gameplay and contains an all new weapon for players to use, the Desert Eagle. Some notable fixes include improved support for buggies and several balance changes to make it a little easier for players.
You’ll need to use cheats to get access to the Desert Eagle for the time being. Check out the instructions here