Obsessive compulsive disorder that manifests during gaming. A person may not have OCD in real life, but will display OCD behavior in a game with exhausting inventory organization, breaking every possible breakable object in the room or always reaching the level cap.
-Dude, why did you just shoot the wall? There was nothing there.
-I had 101 bullets, needed to round it to a 100 so it was perfect.
-You should learn to control your gaming OCD.