Oh cool, I usually stumble upon these kind of contests after they're done with.
Let's see... worst game I've ever played? I usually try to push those kind of memories to the deepest recesses of my mind, but if I were to dig back all the painful memories I'd have to say ...
Bubsy: Claws Encounters of the Furred Kind for the Genesis.
Being the keen kid I was in the early '90s I was still trying to find cheap things to play. I should have known from the shitty puns as to what I was getting myself into, but I was a stupid kid, I didn't know better. I can still remember the wretched title screen music and the terrible synthesized voiceovers of Bubsy saying something before a level. Like the first level, "What could possibly go wrong?" except it came out "Whht chhhud pshhbly ghh wrhhg".
It didn't help that the game itself was pretty wonky, and that Bubsy could be killed by anything and

ing everything. Water, falling, touching just about anything in the environment. It was a nightmare. If I could, I'd find the man responsible for it and shit in his heart.
Anyways, that's my bit. If I happen to win my XBL tag is Rickenslacker