Oh I love AC series, but as I just finished third one about 3 months ago and have only played 2h of Liberation on PS Vita means that I probably wont get Unity any time soon. Also ACIV is the only game I have on PS4 currently, but I still have about 10 games left to finish on PS3 before I'm moving on to PS4 which I have had since Last Christmas. Co-Op sounds interesting though, but another thing on that is regions as when I played Brotherhood online with my brother on EU servers from US the lag was horrible.