Synergy has got to be the most pathetic Half life 2 mod I have ever played. Why not just play Half Life 2 Deathmatch?
Half Life 2 Deathmatch, you're playing against a team of other HL2 DM players, and you're not playing campaign levels, Synergy lets you play campaign maps from Half Life 2, Half Life 2 Episodes 1 and 2, and Synergy maps, Synergy is more of a puzzle game cause of it's Synergy levels, it just adds in the HL2 campaign so people can have more fun playing online with others rather than playing by yourself and a bunch of AI's...