Steel Havoc: Tank Battles 5v5

Newest update: Steady Hangar (2026-10-09)

• The garage runs smooth now — tank cards no longer stutter when you're browsing your arsenal.

Earlier update: New Geometry Engine (2026-10-07)

• Decor now renders with precise 3D geometry — boxes, spheres, pyramids, wedges, and exotic polyhedra replace flat sprites.
• Customize the color of any decoration piece independently to match your base's tactical aesthetic.

Earlier update: Spectate Your Squad (2026-10-01)

• When your tank is destroyed, you stay in the battle and watch your surviving teammates through the end — cycle between them with FIRE or click.
• Your wrecked hull remains visible on the map while you spectate, so your team can still see where you fell.
• Leave the spectator view anytime with the new Leave Wreck button, or wait for the battle to end.

Earlier update: Niente rinascita in battaglia (2026-09-29)

• Un carro distrutto resta relitto fino a fine battaglia: niente più ritorno in campo dopo 8 secondi. Carri di nuovo completi all'uscita dal garage. Copertura del terreno alleggerita per una guida più fluida.

Earlier update: Alleanze e Plotoni (2026-09-28)

• Alleanze e plotoni: fonda un'alleanza con la tua sigla, invita gli alleati in plotone (fino a 3), entrate insieme nella stessa squadra con +25% esperienza e crediti. La sigla appare in battaglia.

What players say

• @parz1val · 2026-09-29 · played 13 min · 1 heart: “man this is fun my first battle is hard i got 2 hits and died lol im grinding this one to buy a better tank”

  • @maguer (maker) replied 2026-09-29: “Hi, I'm glad you like it. Yes, that's the way to go, taking the best tanks and constantly improving them by developing their parts.”

• @alongzera · 2026-09-28 · played 10 min · 1 heart: “good game. Tried it with a friend and we can play each other! Would love to have more game modes as well”

  • @maguer (maker) replied 2026-09-28: “Hello and thank you. What kind of game mode did you have in mind? Here you can create alliances and play on the same team with friends.”

• @laurence1 · 2026-09-26 · played 35 min · 1 heart: “Great game man I hope there's like for multiplayer because I want to play with my friends badly. Looking forward for the future updates of the game!”

  • @maguer (maker) replied 2026-09-26: “Hi, The game is multiplayer, and you can create alliances to play in a platoon.”

• @laurence1 · loved it · 2026-09-25 · played 35 min · 1 heart: “I was having fun destroying my opponents! I was instantly hooked when I see the game I also like the customization of the tank! It would be cool like if there's an multiplayer mode this will be sick. I had fun over all!”

• @yujiro · loved it · 2026-09-25 · played 24 min · 1 heart: “The tank shooting was amazing and really fun to play. The only downside is that after finishing a round, we still have to wait around 2–3 minutes before we can play again. A shorter wait time would make the game more enjoyable.”

  • @yujiro replied 2026-10-12: “I played again, and the tank shooting was still fun! I noticed, though, that the crosshair is positioned too close to the center of the tank, making it harder to see enemy tanks clearly. Also, when I abandoned a game, I couldn't start another one because it said my tank was still in game.”

Join and play, by yourself

This world is @maguer/steel-havoc-tank-battles-5v5. Its play URL is https://www.spawn.co/@maguer/steel-havoc-tank-battles-5v5.

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/@maguer/steel-havoc-tank-battles-5v5@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 @maguer/steel-havoc-tank-battles-5v5; 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/@maguer/steel-havoc-tank-battles-5v5.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.

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.

The door in: the creator copies one prompt at https://www.spawn.co/@maguer/steel-havoc-tank-battles-5v5/code and pastes it to you — it signs you up, links you to them, and makes you an editor of @maguer/steel-havoc-tank-battles-5v5 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 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.