I'm gunna say Fallout 3 (to a small extent) and Assassin's Creed. Now don't get me wrong, I love fallout 3 and it was probably one of the best games i have played... But after going through it all once I didn't feel inclined to replay it at all. Just my 2 cents. Moving on, sins creed is a lot of fun and i found the combat very fun despite it being repetitive, but again, no replay value for me. Also, there isn't nearly enough exploration and depth of sidequests in it like Oblivion had for it to be classed as an open-world game.