Of those, just AC;R and Skyrim. If Revelations isn't a big improvement from Brotherhood then I'll have serious doubts about whether the series is worth following to its end. One good game out of three is a poor track record for a series that has shown that it can be high quality stuff. As for Skyrim, I've not played any other Oblivion games, but some ads, reviews and the excitement of my friends who have played them tells me that it should be worth giving a chance.