Synergy co-op Mode gives us an amazingly fun mod called Synergy.  You can use this mod for Half-Life 2, ep. 1, and ep. 2. To install it, you basically have to have the Half-Life games, with the SDK Source installed.  You then run the synergy installation and it’s all set!  Synergy mod even shows up as an independent game in X-fire.  It’s pretty cool

There’s a few kinks I found while playing the game with 2 other people.  There are a few places where the game skips (just a few puzzles, the end of a level, etc..). Another thing is the Half-Life games were obviously made for one player mode, and when you have multiplayer- it gets a little easy.

But it’s frackin TOTALLY RAD to run into a level with a team and take it out in minutes~!! omg!  Play it!!  It’s really fun to go through the Half-Life games on multiplayer!!!