Jeopardy!

Based on the well known game show of the same name. The basic idea behind the game is that you are given a choice of categories, each with an answer to a question behind the square. Your job is to figure out the question that corresponds to the given answer (for example, the answer is Star Wars. The question would be: George Lucas' Trilogy?, or something like that.)

There are over 3500 answers to find questions to, in different game types including Tournament, Speed Match and Single Round. And in every case, Alex Trebek (the host) is there to tell you if you are right or wrong.