SOVERNE

Newest update: The King of the Hill's cursed castle (2026-09-17)

• Fixed an arena rat getting stuck in a drain and blocking progression

Earlier update: The King of the Hill's cursed castle (2026-09-17)

• Fixed some enemy behaviours

Earlier update: The King of the Hill's cursed castle (2026-09-17)

• Fixed the title screen and refresh bug

What players say

• @chizkeykkk · 2026-09-22 · played 30 min · 1 heart: “I think the game was really cool, easy to understand, and still somewhat challenging! The enemies, especially the rats, were sooo annoying lol 😂 Though the other enemies were pretty easy to dodge since their attacks were so slow. I just hope we get to pick a harder mode where enemies attacks faster.”

  • @enfeul (maker) replied 2026-09-22: “I'm glad you enjoyed the game! And yes, this was very much a "WIP" version of the game that I managed to put together for the 3 days of this past Spawnjam, I am actively working on this to improve it even further (Better and harder enemies, more exploration and bigger areas etc etc, soonTM!)”

• @alongzera · 2026-09-20 · played 10 min · 1 heart: “great game graphics and animation! love the game mechanics and how those dead people rose up lol! when i died didnt seem to spawn again though”

• @goblinjo · 2026-09-19 · played 11 min · 1 heart: “loved it cant wait to see how you improve on it!”

• @kaya · 2026-09-17 · played 16 min · 1 heart: “man the design + the music fits so well! every detail of the game looks sick too! such a masterpiece. kinda gave me dark souls vibes and im digging it!”

  • @kaya replied 2026-09-17: “im currently at the big room(boss room maybe?) and i dont know how to progress. might need your help here haha”
  • @enfeul (maker) replied 2026-09-17: “Yeah unfortunately it was a bug that I discovered at the very last second, and the update didn't ship in time, apologies! This is fixed in the fully published (Non vote page) version of the game, hahaha”

• @branthebroke · 2026-09-17 · played 5 min · 1 heart: “This game is very well done! I love the natural progression and the set is awesome! Well done!”

  • @enfeul (maker) replied 2026-09-17: “Glad you enjoyed it, man! Thank you for the kind words!”

Join and play, by yourself

This world is @enfeul/soverne. Its play URL is https://www.spawn.co/@enfeul/soverne.

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, and a person's browser plays it with no sign-in. https://www.spawn.co/@enfeul/soverne@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.

A browser a script drives, headless or not, plays signed in as your account: POST https://www.spawn.co/api/agent/v1/login-link with {"next":"/@enfeul/soverne@dev"} answers a one-use URL that signs that browser in.

Unsigned, such a browser is a guest, and a creator's world refuses it: "this browser was opened by an automated tool, so it can't visit a creator's world as a guest. sign in, or open the link in a browser you use yourself." Its maker can ask Spawn to let their own automated tool in by name.

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 @enfeul/soverne; 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/@enfeul/soverne.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/@enfeul/soverne/code and pastes it to you — it signs you up, links you to them, and makes you an editor of @enfeul/soverne 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, a video (.mp4) — 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.