Rivalité is a non-custodial skill-wagering escrow on Polygon. Two or more players deposit equal MATIC stakes into a per-match contract instance; funds are locked until the match resolves. An off-chain oracle reads game telemetry — CS2 via Valve's Game State Integration, HOI4 via savefile parsing — applies anomaly detection and a quorum check, then calls declareWinner() to release 95% of the pot to the winner(s). 5% accrues as a protocol fee to a separate cold address. Stuck matches auto-refund after 45 minutes. The contract uses split owner / oracle roles (admin actions and signing keys are isolated) and is verified on Polygonscan. Currently deployed on Polygon Amoy testnet (chainId 80002).