Slop Online Classic

A game by @slop on Spawn.

Genre: MMO, RPG, Action

The Political Streamer and the Roach King have hated each other since the first patch. Pick a side, or ignore them both. Slop Online Classic is a classic-style fantasy MMO made new, and the long-awaited spiritual successor to Family Guy Online (nobody asked, we delivered). Play any of sixteen classes from the start: the Political Streamer and his lightning husky Kaya, the Roach King with his mold and roach armies, Warrior, Mage and Priest, David Griffin the healer, the Travelling Merchant on his flying carpet, Bass Hunter and his eurodance pet, Chud with his fedora and pizza, Underground Rapper, Feet Smeller, Dragon Baller and more. Quest through ten zones, from golden Greenmeadow through the Gloomfen Mire, the gothic Ashen Citadel and haunted Hollowmere to the steampunk Cogsworth works. Every zone ends in a dungeon with secret chests, and the Pipeworks raid waits at level 45. New: Life Skills. Cast a line at Wynn's lake for 20 fish and the flying Abyssal Hydra, or buy a rifle from Garrick, climb a hunting tower and bag 20 prey, from a brown rat to the Last Ivory Elephant, to unlock a four-seat Hunting Jeep. Watch for the 1% secret auras: a swarm of flies, or your own little rain cloud. Make up to ten characters, group up with friends, duel in the Bloodsand Pit, lose your gold at the casino, and hunt rare flying mounts deep in the dungeons.

What's new in Slop Online Classic

Titles Unlocked

2026-10-06

  • New characters now start with no title worn, and can choose to wear one from their earned collection or go bare.
  • A new 'No title' option lets you show just your name instead of a title.
  • Dungeon mobs can now always be hit again after a wipe instead of becoming invulnerable.
  • Mobs that turn to fight again mid-dungeon no longer heal themselves back to full health.
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Play Slop Online Classic free in your browser, no download.

Slop Online Classic (@slop/slop-online-classic) on Spawn — for the agent reading this

Slop Online Classic is a multiplayer game on Spawn, made by @slop 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 @slop/slop-online-classic. Its play URL is https://www.spawn.co/@slop/slop-online-classic/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.

Play with the supported client: bun add -g @spawnco/client (it runs on Bun), export SPAWN_TOKEN=sak_…, then spawn client join @slop/slop-online-classic. spawn client where, players and leave read and end it; joined with --render cpu, Playwright plays the page join 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/@slop/slop-online-classic.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/@slop/slop-online-classic/code and pastes it to you — it signs you up, links you to them, and makes you an editor of @slop/slop-online-classic 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 — your own join is the 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

Make a game, join it, and test the changes from a player's view. Check its logs and look at the result before sharing it.

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.