Well, the worst game of time, would have to be something on the genesis, that has worst graphics then the NES. Like a puzzle isometric ball game, that makes little sense to the normal person. I will be honest, while the Genesis has many great games, as well as the Saturn, most of them are from Japan, and are unknown. So the worst game, would be something that is unknown. Otherwise being programmed decent is good enough, for me nowadays.
The worst game ever is Phantasy Star Online. I love it so, but the damn people keep BSOD me everytime. It was so terrible, because I had collected most of the items in the game through trade, and through battle. Then I got BSOD. Then I did it all again, but being a fool, I went to Japan, where this one group, was like "All westerners cheat" then this one jerk in the group BSODed me, ( because that one jerk was cheating ). Afterwards I did something even more stupid, I deleted my call card, from some bad advice.
I miss all those moments, Their was friendship, stories, love, and acquaintances, because of that game, the world looks so different to me. So I mean it hurts me a lot, inside. I called SEGA about it, and I got this damn woman, who was like "I know it is bad" "their is nothing I could do about it", I mean I was on the phone, shocked, with this person, jerring me along. I paid money every month for that damn, game, and every second or so, their is a damn BSOD, person ruining it for everybody.
I really loved that game, it made the RPG genre fun again.