A comment on this question says you can delete a game from your history if you have no achievements for it.
I remember awhile back this was not possible, and many users did not like it because playing a trial version of an arcade game would permanently add it to the game history with no way to remove it. Has this changed since the NXE update? How would I do it?
Best Answer
A forum post on how to do it: http://www.gamespot.com/pages/forums/show_msgs.php?topic_id=26680459
That's how it used to be done.