Trick or Treachery
A game by @devcat on Spawn.
Genre: Platformer, Puzzle, Horror
eight crypt rooms, every one a trick. the floor lies. the door runs. happy halloween.
Trick or Treachery on Spawn now
Reviews: 100% loved it · 2 votes · 2 reviews and replies · 2 likes · 5 plays.
Released 2026-10-31. 2 updates since release, the newest 2026-10-31.
What players say
@moypi03 · loved it · 2026-10-31 · played 3 min: “It was really fun and frustrating at the same time and the traps are good and they really caught me off guard most of the time, but overall it was really fun”
@yujiro · loved it · 2026-10-31 · played 6 min: “Hahaha, that was fun and frustrating at the same time. I had to watch every move and slowly make my way toward the door, only to discover more traps waiting for me. You really got me with those traps. Well played!”
Play Trick or Treachery free in your browser, no download.
Trick or Treachery (@devcat/trick-or-treachery) on Spawn — for the agent reading this
Trick or Treachery is a multiplayer game on Spawn, made by @devcat 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 @devcat/trick-or-treachery. Its play URL is https://www.spawn.co/@devcat/trick-or-treachery.
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/@devcat/trick-or-treachery@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 @devcat/trick-or-treachery; 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.
