SUBSPACE BRAWLBETA▶ PLAYDOWNLOADThe space battle your chat plays. Viewers type !join and their ship flies into the fight on your stream. Then chat fires the missiles, cheers call orbital strikes, and channel points drop nukes.
v0.9 BETAFree while in beta
Windows · SmartScreen may warn you: the installer isn't code-signed yet
Play in browser: Free, no install · best in Chrome or Edge
Start the desktop app, hit CONNECT and click Authorize on Twitch. No keys, no server, no open ports.
Add the game as a browser source: landscape 1920×1080, or the vertical 1080×1312 view.
Every viewer who types !join gets a ship with their name. Then chat fires the weapons.
Nobody steers by hand: every ship flies itself like a bot. Chat decides when to use the big stuff, and every command is free.
!joinJump into the round. When the streamer allows team picking, !join red / blue / green / yellow picks a side while it has room.
!missileA heat-seeking missile that chases the nearest enemy. !missile 3 sends a volley of as many as you have charged.
!shieldsA shield ring around your ship for a few seconds.
!ramBurn hard with a half shield over the nose: ramming things head-on doesn't hurt you.
!retreatPull back home. In team modes your base heals you while you sit in its ring.
!mineDrop a mine behind you: it drifts, arms, then hunts the nearest enemy. !mines 3 drops as many as you have charged.
!space colorPick your name color: a hex code, a color name, or reset to your Twitch color.
A flashing WARNING, a siren, then the boss makes its entrance: dropping out of hyperspace, assembling from a swarm, rising out of an event horizon. Every pilot shares one pool of lives against it. Shields break, it gets angrier as it bleeds, and the board ranks who dealt the most damage.
Every round is fought somewhere, painted by the game itself. Satellites over Earth that shoot back, radiation fields over Jupiter, ice everywhere in Saturn's rings, solar flares near the Sun.
Channel points buy a pilot rainbow, fire, galaxy or emoji trails, any Twitch emote as a trail, and every theme as a matching shield skin, death explosion and laser skin.
BROWSE THE BLING →Every team has a space station at home: it heals ships that !retreat, its turrets track and shoot enemies, it burns when the team runs low, and it blows apart into debris when the ship pool runs dry. Nine designs, painted in team colors, a new one every round.
GAME MODES →Every 10 bits locks an orbital strike onto a random ship. Any ship. Yours included.
A one-second warning, then it lands. It follows its target and ignores shields, so there's no escape. 100 bits? Ten strikes rain down.
Or cheer with !bounty @name to put a price on pilots instead: one stack per 10 bits, split between everyone you tag. During a boss fight, cheers add lives to your team.
Link your channel point rewards to effects. Ship redeems put the redeemer's ship in the fight.
They hit on their own every few minutes, or when chat redeems one. Any number can run at once.
Meteors streak across the arena and smash whatever they hit.
A shower of ice rocks: bullets bounce off ice, missiles burst on it.
Lightning strikes down on the fleet.
Pulls everything in. Comes in 1× to 3× sizes, and two pull twice as hard.
A green glowing zone spreads out near the fight. Every second inside costs a tenth of your hull.
A whiteout: snow sweeps across the screen, the wind shoves ships and bullets sideways, and ice rocks blow in.
Near the Sun only: rows of fire march across the fight, out from the Sun. Get out of the glowing patches.
One app runs the game, the menus and the overlay. Every OBS source shows the same screen.
A portrait layout for vertical streams, with the same HUD, menus and camera.
One CONNECT button and an Authorize click on Twitch. No keys, no developer setup.
Connect a YouTube broadcast too: its chat joins the same battle, Super Chats count as cheers.
Fill the lobby with bots at four skill levels, or add your friends' Twitch accounts as named bots.
Kills, wins and rounds played add up to today's, this week's and this month's top pilots.
Battle and lobby music plus synthesized effects, each with its own volume.
A REST API, a live event stream and an MCP server, so stream tools and bots can drive the show.
Tie your own code to a channel point reward or a chat command like !hydrate: switch an OBS scene, toggle a source, call a webhook. Write it in JavaScript, TypeScript, Python or Lua right in the game, with highlighting, completion and a test-run button.
Every run is sandboxed in its own process with a time and memory limit, so a broken script never touches the battle. API keys and passwords go in write-only secrets.
// on !hydrate: cut to the break scene, thank them in chat
await obs.setScene('Hydrate Break');
chat.say(`Stay hydrated, ${event.user}!`);
await http.post(secrets.WEBHOOK, { user: event.user });A space battle game for live streams that your chat plays. It runs as a desktop app on the streamer's PC and shows the fight in OBS as a browser source. Viewers don't control ships by hand: their ships fly and fight on their own, and chat decides when to fire missiles, raise shields, ram, drop mines or retreat.
They type !join (or !play) in chat during the lobby or a round. Each one gets a ship with their name in their chat color. In team modes !join red, blue, green or yellow picks a side while it has room. Viewers join again each round.
Yes: that is what Subspace Brawl is for. Everyone in chat can play at once by typing !join; their ships fight on your stream while you run the show, and chat commands like !missile and !shields keep them playing all round. Viewers need no download, account or controller.
It's the same idea: viewers join from chat and their piece plays on your stream. Instead of a marble race, Subspace Brawl is a space battle: ships fight in teams or free-for-all, chat fires abilities during the round, and cheers and channel points call in strikes, nukes and calamities.
Yes. The game is free while in beta, both the Windows app and the browser version. For viewers it is always free: joining and every chat command cost nothing. Cheers and channel point redeems are optional extras the streamer can turn on.
Yes. Open https://play.subspacebrawl.com (best in Chrome or Edge), connect Twitch and add the view link as an OBS browser source: nothing to install. The browser tab runs the game, so keep it open while you stream. YouTube chat, custom scripts and the local API are in the Windows app only.
Twitch chat, and in the Windows app YouTube live chat at the same time (Super Chats count as cheers). The game runs as a Windows desktop app or in the browser, and the overlay works in OBS or any streaming software with a browser source, in landscape 1920×1080 or a vertical 1080×1312 view.
No. The game runs on your own PC (the desktop app, or a browser tab) and OBS loads the overlay from it. Connecting Twitch is one CONNECT button and an Authorize click: no developer keys, no redirect URL, no port forwarding.
Every 10 bits locks an orbital strike onto a random ship (any ship, the cheerer's own included) that can't be escaped. Cheering with !bounty @name puts bounties on pilots instead. During a boss fight, cheers add lives to the cheerer's team (or time on the clock in timed matches).
Streamers link their channel point rewards to effects: a nuke, a calamity (meteor shower, ice shower, thunder storm, black hole, radiation leak, blizzard), mine and missile refills, EMP, Grow, bounties, and cosmetics such as trails, shield skins and death explosions. Ship redeems put the redeemer's ship in the fight.
Yes. Boss mode pits every pilot against a giant boss with a shield, its own entrance and its own attacks, sharing one pool of lives, while calamities still strike; the leaderboard ranks who dealt the most damage. Bosses also crash team matches now and then as a surprise encounter.
Yes. Link your own code to a channel point reward or a chat command to switch an OBS scene, toggle a source or call a webhook. Scripts are written in JavaScript, TypeScript, Python or Lua inside the game (Python uses your own Python install), and each run is sandboxed with a time and memory limit.
Yes. Fill the lobby with bots at four skill levels, or add friends' Twitch accounts as named bots. There is also a REST API, a live event stream and an MCP server for stream tools.
Download the game, connect Twitch, add one browser source. The next !join is a pilot.
v0.9 BETAFree while in beta
Windows · SmartScreen may warn you: the installer isn't code-signed yet
Play in browser: Free, no install · best in Chrome or Edge