I do not have an opinion over the real worst game ever, as I stick to the road on games. I play only those that are rated high, and typically stay to those that are brand name.
However, I will note the worst sequel I've ever known, and that is Animal Crossing City Folk. It is a very cheap rehash of Animal Crossing Wild World. They didn't even change the soundtrack.
The game is so disappointing and cheaply thrown together that I lost a lot of faith in Nintendo when I got it. I loved the first Animal Crossing and thought it was one of the best games I'd ever played. But Animal Crossing City Folk? They should have never released that piece of trash if they weren't going to put any work into it.
And believe me, they did not. It is such a cheap rehash that I think we all should have got it for free if we've owned a previous Animal Crossing game.
BTW, Cream-of-Chicken, what is up with the signature?