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I've lost count of the onchain games that asked me to trust them.

Trust that the board wasn't rigged. Trust that the "AI opponent" wasn't the server peeking at my hand. Trust that my hit really was a miss. And before any of that, trust a wallet pop-up asking for gas before I'd even seen the first level.

So for #NEARHackathon I flipped it around. I built the @threejs NEAR Arcade: nine browser games on @NEARProtocol testnet where you play first, and the chain proves everything afterwards.

You walk up to a cabinet and press Insert coin. No wallet, no seed phrase. You just play. If you want to be ranked or own something, you sign in once with a NEAR wallet, and from then on the game pays your gas (NEP-366 meta-transactions through each game's relayer).

Underneath, every game keeps a secret and then proves it:
▸ fleets, sabotage cards, battle orders and merchant price limits are sealed onchain before play and opened after
▸ boards nobody can rig, because they come from a committed salt plus NEAR's block VRF
▸ AI rivals that are real agents with their own NEAR accounts, holding function-call keys capped by the contract
▸ AI characters that speak through a TEE model on @near_ai @out_layer Cloud, every line signed and checked in your browser
▸ NFTs that carry a purse, tokens that burn and mint by game rules, a real @SputnikDAO treasury, barter through @near_intents

And every game ships one command to replay any match against the contract from public RPC, with no keys and no trust in my server.

Then there's the Arcade Passport. Connect a wallet and you see one streak, one points counter and your progress across all nine games, updating live from the chain.

The tracks it covers: Games With Real Economies · Privacy & Private AI · Agent Economy · AI Swarms · AI Security & Defense · NFTs That Do Something · Memecoins With Mechanics · Social Money · Unstoppable DeFi · Investment Thesis · Open Innovation

Play free: http://arcade.lopeselio.online
Code: http://github.com/lopeselio/near-arcade

Below is one story, and one video, per game 👇