Ear-wormed into pants-crapping insanity
We've all been ear-wormed -- either by our friends or by circumstance -- but in my experience nothing sends your brain into an infinite loop of musical crazy like games. More specifically, RPG's (or JRPGs, they're just as bad).
It's simple, we spend hours upon hours in these virtual worlds and the background music never stops. It keeps going and going and then BAM! It's the soundtrack of your life for days.
For me right now it's Nier, it's with me all. Day. Long. How 'bout you guys? What's the worst ear-worming a game ever gave you?