I got ACR. If you like the AC games, you'll like it. Almost like an expansion pack though, with a weird kind of annoying tower defense mini-game thrown in. I liked it.
Got a free game this week from a nerdy coworker I really don't want to be friends with. Dark Souls or something. He assured me it is 1) the hardest game available and 2) the most organically interactive, with other players able to randomly encounter you and challenge you to duels or some crap. Both points were like the worst possible thing you could have told me.