I haven't played but here's the description from the web site.
"Outwit Me is your home for a variety of unique Twitter games that have been specially crafted with artificial intelligence. You are here to be challenged, entertained, stimulated. We are here to engage your mind and of course to outwit you. Each game is designed to be never-ending such that once a round is completed, the next one will start automatically. That means that you can always join in at any time of day. Our games feature tweeting of clues and on-line play."