Clue was awesome! The whole cast had a lot of fun with that, it was obvious, but I didn't know it was received poorly. :/
It just narrowly failed to break even in terms of money. A big criticism was that it was boring at certain points.
Apparently they also made a fourth ending where just like the third Curry was the villain, but he proceeded to lock everyone in the basement and then attempted to escape in his car only to find out that one of the dogs had gotten in it similar to the raptor in Jurassic Park, at which point the movie was to fade to black. They considered it too over the top and that the third ending was the most superior of all four, so it was not included in the film. I don't remember if it was actually filmed or ramained just a script.