Currently underway in the United States and Canada, participation in the beta previously required Xbox 360 owners to have bought or redeemed an Xbox Live Gold membership.
Once out of beta, the surprisingly addictive trivia game will offer skill-based prizes, including virtual Microsoft Point funds and Xbox Live Arcade games. The more members of the 100-person "Mob" that "The One" outlasts by correctly answering questions, the higher the payout, with the remaining "Mob" receiving prizes if they outsmart "The One."
The better a player performs in the scheduled "Extended Play" sessions, the more likely they are to be chosen as "The One" or in "The Mob" during live sessions, with everyone else still able to participate and answer questions from their spot in "The Crowd." In recent sessions, the game has seen tens of thousands of simultaneous players.
I played this last week. All the answers were 'A', but I still didn't win because I dint know they'd be 'A'...