Robinhood Chain · Free Mint
5555 heroes escaped from the arcade cabinets of 1978. Six traits, four rarities, ten one-of-one Legends — and every lunar cycle, one randomly drawn holder takes home 70% of the royalties.
The project
Retro Heroes gathers 5555 characters born in an era when a hero had to fit in a 48-pixel square. Every one of them is drawn by our own pixel engine — hand-placed pixels, one shared palette, warm light and cool shadow, the way sprites were made when cabinets ruled the world. None of them is a copy of anything: they are originals, dressed in the mustard-avocado-burnt-orange wardrobe that defined an entire decade.
No mint price. You only pay gas — and on Robinhood Chain, that's a matter of cents.
A strict cap of 2 per wallet in each phase, and minting through another contract is blocked. The goal: many holders, not a few whales.
The 6% creator fee flows straight into the contract. Every lunar cycle — every 21 days — 70% goes back to one randomly drawn holder.
The mint
The three phases run one after another from a single timestamp written into the contract. Nobody can bring them forward or delay them on the fly.
Reserved for the team wallet: 10 pieces set aside for contests, giveaways, and future partnerships. No other wallet can mint during this window.
Open to allowlisted wallets, based on a snapshot of a partner collection announced before the mint. Your wallet is verified by Merkle proof — instant, no sign-up.
Open to everyone, with no end date: it stays live until all 5555 are minted. No race, no pointless gas war.
The rarities
The proportions below are not probabilities: they are exact counts. Every trait is drawn from a pool built in advance, which makes the number of copies exact to the token.
Tier attribute and a Rarity Rank
out of 5545, computed from the combined rarity score of all six traits. The ranking follows
the same 55 / 28 / 13 / 4 split — one Tier filter on OpenSea and you see the collection's 222 Epics.
The traits
The six traits stack in this order: Background, Chassis, Gear, Head, Optics, Power-Up. The combinatorial space is almost a thousand times larger than the collection, so no two heroes are alike.
The jackpot
One draw per cycle — every 21 days, enforced by the contract
The 6% creator fee on every resale flows straight into the contract. Each cycle, the contract randomly draws one NFT — not a wallet — and its current owner gets paid. Nothing to claim in advance, nothing to sign, nothing to stake: holding the piece is enough.
Every NFT is weighted by its rarity: an Epic is worth six Commons, a Legend fifteen.
The randomness comes from a commit-reveal scheme. In other words, the team publicly commits to a secret number before anyone can know who might win, and can never change it afterwards.
The very first draw is not at the team's discretion: the contract refuses to open it until three conditions are met, all of them verifiable on-chain by anyone.
All 5555 pieces minted, or an official closure written into the contract. Once over, the mint can never be reopened.
A minimum two-week delay after the end of the mint, to let the secondary market settle and the first pot take shape.
The contract must have collected at least 0.3 ETH in royalties — the equivalent of roughly 5 ETH in secondary sales. No draw over an empty pot.
firstRoundReady() function shows at any time which ones are met.
And once the first round opens, these thresholds can never be changed again.
The 1/1s
The first ten tokens are hand-built compositions that share their DNA — but not
their look — with the rest of the collection. They carry a single attribute —
Legend — bearing their name. Filter on that attribute and you get
exactly ten results: impossible to fake.
Questions
The mint is free — 0 ETH. You only pay network fees, which on Robinhood Chain amount to cents.
Network: Robinhood Chain · chainId 4663 ·
RPC https://rpc.mainnet.chain.robinhood.com ·
currency ETH · explorer https://robinhoodchain.blockscout.com.
Most wallets can also add it in one click from a connected site.
Yes. The two counters are independent: an allowlisted holder can end up with four pieces in total. That's deliberate — it's the reward for backing the project early.
Because the fingerprint of the secret number is published before anyone can know who will win, and it's written into the contract. At draw time, the contract rejects any secret that doesn't match that fingerprint. The team is left with exactly one possible move: reveal the number it committed to.
And if the team reveals nothing? Three days after the deadline, anyone can settle the draw in its place. The money can never be locked up.
Every 21 days, precisely — the duration is a constant in the contract, and nobody can speed it up. We call it a lunar cycle because the project runs on the rhythm of a waxing moon: the pot fills while the moon climbs, and the draw lands on the project's full moon. Purists will note that an astronomical lunar cycle lasts 29.5 days — ours is more generous to holders.
When three conditions written into the contract are met: the mint is over, at least 14 days have passed since then, and the contract has collected at least 0.3 ETH in royalties (roughly 5 ETH of secondary volume). Not before — even if the team wanted to, the contract would refuse.
You can check the progress yourself by calling firstRoundReady()
on the contract from the explorer: the function spells out which conditions are still missing.
The odds follow the NFT, not the wallet. The buyer picks up the entries attached to the piece the moment the transfer confirms, with zero paperwork. What matters is who holds the NFT at the instant of the draw.
Because a per-wallet draw rewards scattering: you could just spread your pieces across ten addresses and multiply your odds. By drawing NFTs, a piece carries its entries wherever it sits — impossible to game.
It's also what gives rarity a concrete purpose: an Epic counts six times as much as a Common, and a Legend fifteen times. You can read it straight from the contract.
The project's running costs: hosting, decentralized image storage, additional artwork, and the contests fueled by the ten pieces the team set aside.
The contract declares 6% via the ERC-2981 standard and implements the ERC721-C interface, which lets compatible marketplaces — including OpenSea — reject sales that would bypass the royalty. No standard can enforce it on 100% of existing platforms, but it's the highest level of enforcement available today.
No, and that's deliberate. Every hero is an original creation drawn by our own engine, inspired by arcade aesthetics, never a licensed character. Derivative collections tend to end up delisted — this one is built to last.