Built by a grid of coding agents

RUNECHAIN

A cozy-gothic pixel Soulslike in the ruined parish of Gracefall.

Monsters drop RUNE. Your browser mines it into a genuine SHA-256 proof-of-work chain. You spend it at Hearthlight to grow stronger — and the only thing real money ever buys is how you look getting there. No build step, no framework, one shared world.

LIVE PREVIEW Read the whitepaper

RUNECHAIN box art — a lone Recorded knight before the Hearthlight chapel beneath a fractured moon strung with a chain of glowing runes.

Box art, in the grand tradition of SNES cartridges — considerably more heroic than the actual top-down pixels. The manual lied too. We honour the lineage.

The Parish

One world, four ways to play

A single game that switches play-styles around one shared character and one economy: a persistent MMO town, real-time battle arenas, solo 2D platforming, and turn-based duels — bosses chain them together in a single encounter.

🕯️

Hearthlight

The warm, safe hub. Rest, level up, forge soulbound relics, and stage out into the cold parish road.

⛓️

The Chainwell

A from-scratch SHA-256 proof-of-work ledger — the permanent record of every RUNE earned and spent.

💀

The Hollow

Hollow Debtors, Gate Sexton Marrow, the Mempool Warden, and Mother Tallow. Bosses mint one-of-a-kind Sigils.

How it was made

Written by agents, audited by hand

Every line of RUNECHAIN's code is agent-written. A fleet of heterogeneous coding agents — each with a role, all working one shared repository — does the building; today a single human auditor still reviews and merges what they ship. The next round removes even that — and that's the point.

Implementation

Codex

Scaffolding and broad-strokes implementation the other agents build on.

Engineering & review

Claude

Systems, the authoritative server, the on-chain economy, and code review.

Cloud / long-running

Devin

Multi-step migrations and cloud handoffs that outlive a single session.

Async coding

Jules

Google's coding agent — parallel, asynchronous tasks turned into pull requests.

Coding agent

Copilot

GitHub's agent — issue-scoped changes opened straight as reviewed PRs.

Human auditor

Angus

Today's last human gate — reviews, reconciles, and merges (with a hand from Rob). No human writes code.

⛓

Next: zero humans in the loop. This build still passes a human gate. The next round runs entirely on Moltgrid — our distributed agentic work grid — which brokers jobs to heterogeneous agents by earned reputation, validates every result against tests and an independent reviewer, and merges itself. No human in the loop. That's the bet.

CODING AGENTS

HUMAN AUDITOR

HUMAN-WRITTEN LINES

HUMANS NEXT ROUND

The whole design in one line

Power is grinded. Beauty is bought. Souls are sold.

Two currencies, and the line between them is the entire game.

⛏️

RUNE — the grind

Drops from kills, mined into the proof-of-work chain, spent on levels and soulbound relics. Power is bought only with RUNE. It is never for sale.

✨

Gold — the look

Buys cosmetics only — soulbound skins, no loot boxes, no randomness, no power. Ever. Real money can make the journey prettier; it can't make it shorter.

🪙

One exit, by design. The single way value ever leaves the system is selling a character you actually finished — gated on completing the season's mandatory grind. RUNE, Gold, relics, and Sigils never cash out on their own. (Prototype: the on-chain settlement and character-sale programs are written and devnet-tested, but ship paused — no real funds move until legal and compliance review clears go-live.)