The Marble Olympics is the longest and most complete game on the platform. Two marble teams play a football final, shooting at an orange and a red goal over 90 game minutes compressed into 10, 20 or 30 real ones. You trade a live market on the result the whole way through, plus a stream of short-lived side bets, and everything settles on the actual final counts.
What makes it worth the time is that it combines three separate skills that the other games test one at a time: estimating a hidden parameter from historical data, pricing a non-linear payout, and reacting to news faster than the quote does. It is the closest thing here to sitting on a desk.
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