Two worst PS1 games I have:

Criticom-If the controls weren't so hard to figure out, this would almost be decent for an early PS1 game. The computer drains half of your life while you just sit there, wondering what to push.

Chess-Unless you are desperate to play chess and have nobody to play against, what's the point? There is nothing different about the PS1 version, and the computer beats you 99.9% of the time. (Although, to be fair, I also get beat 99.9% of the time while playing against a human. :P )