Worst game you've ever played?

[Divisible by Waffle]

I don't mean just seen; the worst you've actually experienced for yourself. For me, it's Hydlide, hands down. Call me sheltered if you want, but I do NOT need an 8-bit dungeon crawler that simultaneously rapes my eyes and my ears. That maddening theme song will be the last thing ringing through my ears as I leave this world, I swear to god. Does this game even have a point? Is it even possible to win? Has any human being ever subjected themselves to its sheer terror for more than five minutes at a time and lived to tell the tale? In a way, I don't want to know.