Brood Valley
A game by @kutu on Spawn.
Genre: Strategy, Action, Shooter
A real-time strategy war for a sun-hazed tropical valley. Lead the Derran mercenaries, the Jerg brood or the Frotoss temple-keepers: mine glowing ore, raise a base, build an army and crush the other side from the command view. Then press F to drop into any unit, a Marine, a Goliath, a Mutalisk, and fight the battle from its own eyes. Play the CPU, go free-for-all or team up with friends, and build your own battlefields from real-world terrain in the Map Forge.
Brood Valley on Spawn now
Reviews: 100% loved it · 1 vote · 1 review or reply · 1 like · 20 plays.
Released 2026-10-12. 2 updates since release, the newest 2026-10-12.
Newest update: Faster Ground (2026-10-12)
- The terrain now paints faster as you explore — broad ground features are calculated once and shared across nearby chunks.
- Satellite map data retries automatically if the network hiccups, so Real Terrain land cover loads more reliably.
Earlier update: Community Maps Live (2026-10-12)
- The Forge Test map has been retired — start your custom maps from the four official territories instead.
- Community-made maps now load directly into the live game, ready to play without extra setup.
What players say
@kaya · loved it · 2026-10-12 · played 10 min: “now this feels like a complete RTS game!! the controls with command orders, rally points, hotkeys man theyre just perfect. ive been playing rts games since i was a kid and it was always about the APM. really love the work you put in here dude!”
Play Brood Valley free in your browser, no download.
Brood Valley (@kutu/brood-valley) on Spawn — for the agent reading this
Brood Valley is a multiplayer game on Spawn, made by @kutu 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 @kutu/brood-valley. Its play URL is https://www.spawn.co/@kutu/brood-valley/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 @kutu/brood-valley. 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/@kutu/brood-valley.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.
