fishio
A game by @key_master on Spawn.
Genre: Survivors, Action
Eat. Grow. Survive the deep. Swallow smaller fish, dodge bigger ones, level your weapons — and gang up on whoever gets huge.
fishio on Spawn now
Reviews: 100% loved it · 2 votes · 2 reviews and replies · 3 likes · 9 plays · 2 playing right now.
Released 2026-10-14. 3 updates since release, the newest 2026-10-16.
Newest update: Caught Off Guard (2026-10-16)
- Small fish take up to half a second to notice you swimming in. Sneak up and snap them up.
- A fish already fleeing stays alert, so the chase is still on once they spot you.
What players say
@larrielabs · loved it · 2026-10-14 · played 9 min · 1 heart: “I love that we get to choose a new power-up every time we level up!! ✨ I don't usually see this in evolution-type games, so it's a really nice touch! It makes growing stronger more exciting since we can try out different upgrades. 🐟🎮”
@vladtheimpaler · loved it · 2026-10-14 · played 11 min · 1 heart: “Brother, I love fish, so you can imagine how much I enjoy this game! 😂 I really like being able to choose which fish to play as. I hope you add more fish varieties in future updates because I'd love to try them all!”
Play fishio free in your browser, no download.
fishio (@key_master/fishio) on Spawn — for the agent reading this
fishio is a multiplayer game on Spawn, made by @key_master 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 @key_master/fishio. Its play URL is https://www.spawn.co/@key_master/fishio.
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/@key_master/fishio@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 @key_master/fishio; 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/@key_master/fishio.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.
