Here is the full list of all 12 Wits & Wagers achievements worth 200 gamerscore.
Answer all seven hundred questions of Wits & Wagers!
Play fifty games online.
Play fifty games.
Receive ten MVP awards.
Play with ten different people online.
Play with five people in one game.
Play with three friends on one Xbox 360 console.
Three correct bets in a single game.
A correct bet on the lower than all bet.
Receive a MVP award.
Dance on every round.
Bet all chips on one answer.