30 notes, Centy-Face? I've seen it down to £18 at Amazon recently, probably building up to an Easter deal. Even though I'm enjoying it especially in Co-op, I'm just glad that someone bought this for me as a gift, if I'd spent my own money I would have been hacked off at how short it was, even if I'd got the cheaper price I found. When it comes to remarkable standalone expansions I still can't think of a better example than Supreme Commander Forged Alliance, its new SP campaign lasts up to 36 hours if you play for every objective, and you can play through with three of the 4 races and the 4th in MP. That's three years ago now though.