HighSeaz is a multiplayer open-ocean naval game — buy a ship with real testnet USDG, sail, sink rivals, and auction their loot. Ships only; the sea is the whole world. Live on Robinhood Testnet Chain.
HighSeaz is a persistent, multiplayer open-ocean naval game — Buy a ship with USDG, sail a shared living sea, sink other captains, take their cargo, and auction the loot for more USDG. Own a whole fleet and control one hull at a time while the rest auto-trade as NPC ships.
The economy is player-driven predation, not quests. Rare cargo, ship provenance, bounties and alliances all settle on-chain. A bounty is escrowed in USDG against a specific ship's on-chain tokenId; the first to sink it claims the pot — and the declarer plus their alliance are excluded, so you can't farm yourself.
Built on Babylon.js + Havok physics on a Next.js client, an authoritative Node WebSocket server (20 Hz tick), and Solidity contracts deployed to Robinhood Chain (an Arbitrum Orbit L2). Value is real USDG (Paxos Global Dollar) with gas in ETH. Gameplay stays off-chain and never blocks on finality — the chain is an async settlement layer written by a relayer.
The live on-chain moment: post a real USDG bounty from your own wallet, sink the target, and watch the relayer settle the claim on-chain with a HUD confirmation.
7 production Solidity contracts (ShipNFT, ShipStore, BountyEscrow, AuctionHouse, AllianceRegistry, LootMint, USDG) — 20/20 Foundry tests passing, deployed live to Robinhood Chain testnet (chainId 46630) against real USDG.
Authoritative Node game server: real-time sailing, broadside combat, sinking/cargo, weather, AI/auto-mode fleets, docking, off-chain ledger, and Supabase world-state persistence.
Babylon.js client: Gerstner-wave ocean, dynamic weather, fleet/shop/auction/bounty UI, viem wallet connect + buy-to-play, and a relayer-driven on-chain bounty/provenance flow.
Deployed: frontend on Vercel, game server on Render, assets on Cloudflare R2.
Not currently raising — this is a buildathon prototype.