What's the worst video game you've ever played?

There are probably worst games I've played that I don't recall, but there was a Roller Coaster Tycoon knockoff for the Playstation once. First impressions were "I bet this is going to be as customizable a sandbox game as the computer version". Nope. It's like the actual Roller Coaster Tycoon, except the parks are tiny, so much of the land is unusable, everything costs a bajillion dollars to make, the parks get demolished every time you "succeed" (since it was level-based), and you get absolutely no warning before a game over screen just drops in on you because you took out the wrong loans. Even being a real park owner probably has less checks and balances than it.