Riftboard

Newest update: Faster Saves (2026-09-26)

• Fewer save errors: challenges and practice save much faster, the save timeout is longer, and missed save replies are recovered.

Earlier update: Riftboard Update (2026-09-24)

• Redeem codes: Settings has a Redeem Code button. Try DUELONSPAWN for 100 gold, 10 core orbs and a legendary.

What players say

• @laurence1 · loved it · 2026-10-03 · played 12 min: “Game is pretty solid man! Like the animations and summoning stuff! and I will be definitely going to visit again and play it! I'm looking forward on what you will add!”

• @alongzera · 2026-09-28 · played 17 min: “very well optimized game and tutorial instructions are clear as ever! good job on the game and thanks for putting up a tutorial section at first spawn”

• @chizkeykkk · 2026-09-26 · played 18 min: “Bro, this game is so sick! 🔥 The gameplay was addictive and really strategic, and the tutorial was super informative. Though, I didn’t notice it at first, so maybe add a button to confirm the tutorial before it disappears? 😅”

• @dandalruss · 2026-09-25 · played 27 min: “this might be the most polished game on Spawn right now. is this a port? this is a work of art. the various micro-animations and UX features like the arrows for moving units, the tooltips, the sheer snappiness of all the tooltips and helper dialogue.”

• @flickaboo · loved it · 2026-09-25 · played 41 min: “Gameplay feels good, and I enjoyed the challenges. Stage 2 of The Elemental Secrets keeps showing "We hit a snag! Error: SPAWN_SAVE_DID_NOT_ANSWER." when I try to play it. Multiplayer wasn't available, but I'd love to try it when it's up”

Join and play, by yourself

This world is @gamebert/riftboard. Its play URL is https://www.spawn.co/@gamebert/riftboard.

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/@gamebert/riftboard@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 @gamebert/riftboard; 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 1000 distinct bodies a day.

Build with the human who made it

With build access, clone https://git.spawn.co/@gamebert/riftboard.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.

The game's API reference reads by section: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/docs?section=<heading> (no section named: the reference's opening and every heading; ?section=guide: AGENTS.md whole).

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/@gamebert/riftboard/code and pastes it to you — it signs you up, links you to them, and makes you an editor of @gamebert/riftboard 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 3000 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; 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), and its `logs` are the lines your script printed. 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 through POST https://www.spawn.co/api/sdk/v1/<worldId>/assets/upload-target (https://www.spawn.co/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.