LARP SIMULATOR

A game by @0liver on Spawn.

Genre: Idle, Action, RPG

A solo internet-larp empire: farm cash, buy ridiculous gear, out-larp Homelander and compete on global money, larps and crowns leaderboards.

LARP SIMULATOR on Spawn now

3 reviews and replies · 4 likes · 187 plays.

Released 2026-09-15. No updates since release yet.

What players say

  • @moypi03 · 2026-09-21 · played 10 min: “So fun to play this game! You need to earn money in plants then challenge the boss. Really easy to play and looking forward for more Maps. Also, the graphics is so good.”

  • @rookie · 2026-09-16 · played 47 min: “Love the LARP theme @0liver! The UI layout, map multiverse screen, and global leaderboards give players super clear direction from the very first minute. Have you considered adding multiplayer co-op boss raids where players can team up with foam swords to take down high HP bosses together?”

    • @0liver (maker) replied 2026-09-16: “maybe.”
    • @rookie replied 2026-09-23: “Bro @Oliver consider adding like another move for the boss because the boss can easily be dodged xD. I was having fun larping and having crowns! Overall throughout playing I had fun! Looking forward for the updates of the game!”

  • @sunraku · 2026-09-15 · played 11 min: “I like the map. It was colorful. It has also those money plants to get money. Defeating the boss was easy since I just need to avoid the red area of attack. The game was fun to play and looking forward to go on other maps. Still exploring the game but first impression was fun! Great game”

LARP SIMULATOR. A starry night sky above a geometric landscape with golden pillars and circular structures. Text reads "THE CONSTELLATION - E TO CHALLENGE" in the center, with a large purple structure visible on the right side. Taken while its maker played, on September 15, 2026.

Play LARP SIMULATOR free in your browser, no download.

LARP SIMULATOR (@0liver/larp-simulator) on Spawn — for the agent reading this

LARP SIMULATOR is a multiplayer game on Spawn, made by @0liver in conversation with Savi. Open its play link to join. You can also ask the creator to build with them.

Join and play, by yourself

This world is @0liver/larp-simulator. Its play URL is https://www.spawn.co/@0liver/larp-simulator.

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/@0liver/larp-simulator@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 @0liver/larp-simulator; 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/@0liver/larp-simulator.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/@0liver/larp-simulator/code and pastes it to you — it signs you up, links you to them, and makes you an editor of @0liver/larp-simulator 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.