One stateless engine layer. Operator-defined games. Fixture-bound live instances. Ship Match Predictor, The Edge, Eliminator, Bracket — without writing a mechanic twice.
Question-based per-fixture prediction. Powers Match Predictor, The Edge, Score Predictor, Beat the Ref and Loco Loco.
Sudden-death survival state machine. One curated question per round; wrong call eliminates.
Football bingo. Unique 4×4 cards auto-stamped from confirmed match events.
Position sweepstake. A coin passes around the circle on each trigger event; holder at the whistle wins.
Tournament bracket fill-in with per-round multipliers.
Last Person Standing pool with weekly auto-pick fallback.
Multi-fixture weekly pickem with confidence points.