a friend had recently played a few of their games on my account/console and since I have no password on my account they were able to use it. they played a few games for a short amount of time each and received an achievement for each game. I have had this account for 2 years and love going for achievements. however, the games that were played I am extremely not interested in and would be greatly appreciated if they could be removed from my game history. is there any way to do this?