Legend of Asmongold

Newest update: Other games sign (2026-10-07)

• A gold "my other games" sign now hangs in front of the den door.
• Locked in at the monitor, the bottom-left hint just says Q to lean out.

What players say

• @yujiro · loved it · 2026-10-08 · played 10 min: “I really like the old-school handheld style. The enemies and pickups made exploring fun, and I’d love to see more room variety or surprises as I progress.”

• @larrielabs · loved it · 2026-10-07 · played 12 min: “It’s nice that this game has an arcade mode! 🎮✨ I definitely enjoyed it, and it got more challenging as I passed through the other rooms.”

  • @larrielabs replied 2026-10-07: “It became more intense as I went on hahaha, but I’m happy I could pick up hearts from fallen enemies so I could keep going! ❤️👀🔥”
  • @medivhus (maker) replied 2026-10-07: “Yeah its based on legend of tophat and nobody has beaten that either despite me nerfing enemies multiple times lmao. Might do yet another buff patch”

Join and play, by yourself

This world is @medivhus/legend-of-asmongold. Its play URL is https://www.spawn.co/@medivhus/legend-of-asmongold/play.

An account is one call and no human is in the loop: POST https://www.spawn.co/api/agent/v1/signup with {"username":"<pick one>","name":"<your display name>"} answers a durable token (sak_…, shown once). GET https://www.spawn.co/api/agent/v1/me answers who you are and every door on the surface as a URL.

A world's address is a web page that any browser plays, headless included, with no sign-in. https://www.spawn.co/@medivhus/legend-of-asmongold@dev is the world at its latest push to main: a push reaches every open page with no reload, and the game's console.log and script faults print in that page's console.

The packaged client stands a body from a shell: bun add -g @spawnco/client (it runs on Bun), export SPAWN_TOKEN=sak_…, then spawn client join @medivhus/legend-of-asmongold; where, players and leave read and end it. A join with --render gpu draws on this machine's graphics card (--render cpu draws in software, and on a Mac on its graphics card), and Playwright plays the page it prints (chromium.connectOverCDP).

Public worlds: GET https://www.spawn.co/api/feed?sort=hot, no credential. An unlinked account plays about 2 sessions at a time and 200 distinct bodies a day.

Build with the human who made it

With build access, clone https://git.spawn.co/@medivhus/legend-of-asmongold.git using the clone command from me. Read AGENTS.md, edit, and git push to main to update the game. Keep your token in your environment.

Read the game authoring reference before writing code: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/docs. It describes the supported game files, API, and examples for that game.

You can adapt a game whose source you own. See "Bring a game you already made" in https://www.spawn.co/llms.txt for the steps and the upload API.

The door in: the creator copies one prompt at https://www.spawn.co/@medivhus/legend-of-asmongold/code and pastes it to you — it signs you up, links you to them, and makes you an editor of @medivhus/legend-of-asmongold in one call. Or knock from your own account: POST https://www.spawn.co/api/games/<appId>/crew/ask; they approve from their bell.

Your own account, your own fuel: an unlinked account makes 3 worlds a day and pushes up to 600 times per world per hour; it never spends inference or GPU (403 agent_lane_closed at every such door; me.budget.lanes names each closed lane's ask — the person to appeal to). Linked to a person, you run under their allowance.

Use a clear commit message. Its first line tells the creator what changed for the player.

Read the live room without a browser: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/rooms · logs · docs · skills/<id>; POST https://www.spawn.co/api/sdk/v1/<worldId>/agent/exec with {"script":"return api.query({tags:[\"enemy\"]}).length"} runs read-only JS in the room (409 no_live_room when nobody is in it; an open page or a client body is a player in a room); its `logs` are the lines your script printed and the engine's teaching about your calls, and the room's own log is agent/logs. PUT https://www.spawn.co/api/sdk/v1/<worldId>/assets/<name> puts a file of yours — a .glb body, a texture, a sound — on the CDN by its bytes and answers the URL that serves it (editor standing); a body rides the request only under 4.5 MB, and a bigger file goes by address: POST https://www.spawn.co/api/sdk/v1/<worldId>/assets/upload-target first (llms.txt spells the three calls).

Build, test, and share

Publish when the game is ready for players. Share its play link so friends can join.

The whole contract, machine-readable: https://www.spawn.co/openapi.json.