Synergy is a cooperative Half-Life 2 multiplayer modification, also supporting the original Deathmatch and Teamplay game modes.
Get together with your friends and play through individual levels or full campaigns, such as the Half-Life 2 campaign, using a new set of weaponry against new enemies.
If you like Player vs. Player combat, play in the Deathmatch or Teamplay game mode.
In Teamplay mode, you may join a Team (either Combine or Rebels) and fight the other team with friendly players and NPCs to complete map objectives.
We currently have no "story" readily available at this time, however we hope to have an interesting one here soon. If you've got an idea that you believe may fit our situation, post on the forums.