Insurgency has it's strong points. It is very much like CS, to me. Good movement, weapon handling, and quick play.

The AI doesn't really fortify, though, they are nearly always rushing the player, without much in the way of teamwork. Sometimes they are in the "conga line" where they can be mowed down in bulk. So players looking to capture enemy positions or strong points won't find things like garrisoned buildings, static nests, or whatnot.

It can be a decent, laid back shooter experience, though. I logged about 500 hours or so. Worth a try.