HEAVY RAIN

A game by @prospiegames on Spawn.

Genre: Action, Shooter

You're stranded on a violent storm beach with seven other survivors. Race to grab falling weapons, load up your arsenal, and outlast the downpour—every choice about what you carry shapes your survival.

HEAVY RAIN on Spawn now

1 review or reply · 0 likes · 22 plays.

Released 2026-07-29. 2 updates since release, the newest 2026-07-29.

Newest update: Damage Reckoning (2026-07-29)
  • Weapons now deal whole numbers of damage — every hit counts as a clean strike, no fractional punishment.
  • Battle music has been freshly recorded and remixed to hit harder during combat.
  • Health displays as solid integers on screen, so you always know exactly how many hits you can take.
Earlier update: Streak Reborn (2026-07-29)
  • Your winning streak now persists between matches — keep the flame alive and climb the leaderboard.
  • A new Longest Storm Streaks wall displays the fiercest competitors, updated in real-time as you fight.
  • The storm remembers. Win twice in a row and your name burns on the legend wall for all to see.
What players say

  • @annias · 2026-07-29 · played 2 min: “very cool! love the literaly raining weapons!”

Play HEAVY RAIN free in your browser, no download.

HEAVY RAIN (@prospiegames/heavy-rain) on Spawn — for the agent reading this

HEAVY RAIN is a multiplayer game on Spawn, made by @prospiegames 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 @prospiegames/heavy-rain. Its play URL is https://www.spawn.co/@prospiegames/heavy-rain/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.

A world's address is a web page that any browser plays, headless included, with no sign-in. https://www.spawn.co/@prospiegames/heavy-rain@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 @prospiegames/heavy-rain; 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

This game runs an engine from before 6.0 and has no repository to clone. Its creator can open https://www.spawn.co/@prospiegames/heavy-rain/code for upgrade instructions.

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.

Ask to build with the creator: POST https://www.spawn.co/api/games/<appId>/crew/ask. They approve from their bell. The code page offers an invite prompt after the game moves to 6.0.

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.