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Spawn: Your Place to Make Games with Friends

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you don't have to know how any of this is done. you have to know what you want — and when you don't, she shows you something, you react, and you find it together.

building is a conversation

think of it as shaping clay, not placing an order.

the worst way to use spawn is to write one enormous prompt and wait for a finished game to fall out. the good stuff lives in the back-and-forth — "make a platformer," then "add spikes to that gap," then "the jump feels stiff, loosen it," then "drop a checkpoint before the hard part." every message is a small move you make after watching the last one land, so the game you end up with is one you discovered rather than one you specified up front.

the first message barely matters. the next hundred are where the game actually arrives. when you stall, ask savi — she'll put something on the screen, you'll react, and you're moving again.

everyone's in the room

every spawn game is multiplayer from the first message. the world starts that way. you make something, send a link, and seconds later your friend is standing next to you in it. they can play what you've built or take the other end and build with you, same world, same moment. savi is right there too: three of you in one room, making one thing.

places and instances

a game can be bigger than a single world. places are its separate rooms — a town, a dungeon, a boss arena — each with its own terrain, atmosphere, and rules, joined by the doors and portals you set between them. instances are how a crowd fits inside one: when a second group walks into the same dungeon, spawn quietly hands them their own copy of it, so a thousand players can all be in the dungeon without ever bumping into each other. you get multiplayer at scale and never touch a server.

making money

games on spawn earn through spoins, the currency players spend inside them. give the first level away and sell the rest, sell cosmetics, or just let players tip you — tell savi which model fits and she wires it in. of what a player spends, you keep half and spawn keeps half.

it works the way roblox does. you publish, players show up, and you earn inside spawn while we run the servers and the distribution. there's nothing to export and nowhere else to ship it.

getting good in public

most of spawn happens around other people. the discord is where creators trade work, get unstuck, and find collaborators. spawnjam is the weekly jam — a theme, a deadline, prizes, and a real reason to finish something.

nobody arrives good. you build something rough, watch the person next to you build something better, work out what they did, and try it yourself. that loop, run in the open in front of people who are also still figuring it out, is how a creator gets sharp — and how the whole place keeps raising its own bar.

the toolset grows itself

people build wildly different things here — card games, voxel worlds, 2D fighters, UI-only games, sprawling 3D RPGs. no single editor could serve all of that, so spawn doesn't ship one. when you need a tool, you and savi build it: a cutscene editor for a story game, a wave composer for a tower defense, a loot balancer for an RPG. creators have already made all three.

then you publish your tool as a mod, and the next creator builds on top of it. the toolset is a pile everyone keeps adding to, and it gets deeper every week.

Can I play and build on my phone?

Yes. Open Spawn in your phone's browser to play or build with Savi. Games marked Desktop only need a computer.

For iOS app beta access, check the announcements in our Discord.

How do I make my game work on a phone?

Ask Savi to add touch controls and arrange the game's buttons for a small screen. Try it on a phone before sharing it. Check that players can move, use menus, and reach every action without a keyboard.

How do I change my username?

Inside a game, open Settings from the gear on the right. Select your name, enter the new name, and press Enter to save it.

How do I change my character?

Press your picture at the top of the page, then edit character. Inside a game, open Settings from the gear on the right, select your name, and choose edit character. Describe the character you want in the editor.

Building with Savi

Who is Savi?

Savi is your companion for making games. Talk through ideas, try them, and tell her what to change. You bring the direction and taste. She helps with the terrain, characters, art, music, rules, and all the pieces that make the game work.

You can give her reference images and point out what you like. You can also send a new message while she works to change direction.

Which AI does Savi use? Do I need to connect my own account?

Savi uses Claude Opus 5.5 by default. The models behind her can change as we improve Spawn. Her AI access is included, so you do not need to connect a ChatGPT or Claude account to use her.

Bringing your own coding agent is optional.

What are wisps?

Wisps are Savi's helpers. She can send them to work on separate parts of a build while you keep talking with her. They bring their work back to the same game.

You can ask Savi to split a larger task between helpers, such as working on the landscape and a character at the same time.

What is Lock In?

Lock In gives one build a deeper pass. Type /lock-in with the task you want to work on. Savi offers a plan. Read it, then press the Lock In button in her reply to start.

It can take longer than a normal request. Use it when you want more care on a specific build or a difficult change. Savi will tell you if a Lock In is not available.

Is Focus the same as Lock In?

No. /focus changes Savi's focused look. Type it again to turn it off. It does not change the AI model or give a request more thinking time.

Use /lock-in for a deeper build.

How do I get better results?

Start with a small, playable idea. Try what you made, then give specific feedback: “make the jump shorter,” “put a checkpoint before that gap,” or “keep the castle, but make the lighting darker.”

Reference images and examples help. Tell Savi what must stay the same as well as what you want to change. If you are stuck, ask her to suggest the next step.

Which chat commands are useful?

• /help shows the available commands.
• /debug asks Savi to investigate a bug and work on a fix.
• /lock-in asks for a deeper build.
• /focus toggles Savi's focused look.
• /invite opens the invitation for a friend.
• /agent gives you a one-time key for an outside coding agent.
• /jam brings the current SpawnJam into the conversation.

What does the Context circle show?

It shows how much conversation Savi is working with. Long conversations can be condensed so she has room to keep building. This is separate from your game's saved files and history.

If an earlier detail matters to the next change, remind her of it.

Making your game

What kinds of games can I make?

You can make first-person or third-person 3D games, side-view platformers, top-down games, and games built around cards or menus. Games can be single player or multiplayer.

Describe how you want the game to play. Work with Savi on its camera, controls, and rules.

Is there a limit to the number or size of my games?

You can create as many games as you like. Spawn 6 does not set a fixed size limit on a game.

A large game still needs to run well on the devices people use. Test as you build, and tell Savi which parts feel slow.

How do I create models and animations?

Describe the character or object to Savi. Give her reference images when you have a specific look in mind. Tell her which movements it needs, such as walking, attacking, or opening a door.

Try the result in the game. A short description of what looks wrong is more useful than asking her to redo everything.

How do I import my own assets?

Drop files into Savi's chat and tell her how you want to use them. Common formats include:

• Images: PNG, JPG, and WebP for art, textures, sprites, and reference pictures.
• 3D models: GLB for characters, props, and buildings.
• Audio: MP3 and WAV for music, sound effects, and recorded voices.

For a 3D model, a GLB with its textures included is the simplest file to share.

Can I add characters that talk?

Yes. Ask Savi to add characters with dialogue and voices. Tell her whether they should follow a story, react to the player, or have open conversations.

Can I make custom tools for my game?

Yes. Ask Savi to make a tool for the job you need to do. Examples include a cutscene editor, an enemy placement tool, a wave planner, or a loot balancer.

You can package reusable tools and content as mods for other games.

What are mods? Do I need them?

Mods are reusable tools or content that you can add to a game. You can ask Savi to find, use, or create one.

You do not need mods to start building. Add one when it helps with something you want to make.

Will my older mods work in Spawn 6?

Spawn 6 supports mods, including mods carried over with an upgraded game. Try yours after the upgrade. If something behaves differently, tell Savi what changed and share a bug report if needed.

A mod that adds a useful tool can still help. A mod that worked around an old engine problem may no longer be needed.

How do I save a player's progress?

Tell Savi what should carry over between visits, such as coins, inventory, or completed quests. Also tell her what should reset when a new game starts.

Test by leaving and coming back. Player progress is separate from the history of changes you make to the game.

Can I make a copy of my game?

Yes. Go to Create, open the menu on your game's card, and choose Duplicate. Use the copy to try a different direction.

What are Places and Rooms?

A Place is an area of a game, such as a town, dungeon, or arena. It can have its own scenery and rules.

A Room is a separate session of the game. Use rooms when different groups need their own match or adventure. Tell Savi which people should play together and what they should share.

God Mode and history

What is God Mode?

God Mode lets you fly around and edit things directly. You can move objects, turn them, change their size, and use building tools.

After your first build, open the chat and select God, or hold Tab and press G. Select Player to return to playing.

What are the basic God Mode controls?

On a computer:

• Hold the right mouse button and drag to look around.
• Use WASD to move.
• Double-tap Space to start flying. Hold Space to go up and Shift to go down.
• Right-click an object to select it. Drag its handles to move or reshape it.
• Press R to rotate the selected object.

The bottom toolbar holds shapes, paths, brushes, and saved blueprints. You can also ask Savi to help with a selected object.

How do I undo a change or return to an earlier version?

Select your game's name to open its changes. Choose Undo beside a change to ask Savi to undo it.

For an older version, open All changes, select the change you want to return to, and choose Go back to this. Savi applies the change. Returning to an earlier game version is separate from resetting a player's progress.

Building and testing together

How do I build with a friend?

In a game, press Invite in the bar. Anywhere else, press friends. Or type /invite in Savi's chat. Choose copy build link and send it to your friend. That link lets them build.

If your friend is already in your game, open the chat and press the names at the top. Press Make builder beside your friend's name. To take it back, press Builder beside their name and choose Make player.

Someone already visiting can also ask to build. You decide whether to accept.

Can friends test an unfinished game without being able to edit it?

Yes. Press friends and copy your link. That link lets someone visit. Use copy build link only when you want them to edit too.

You can keep building while they test. In a single-player game, each visitor gets their own play session.

Are unpublished games private?

Anyone with the game's link can visit it before you publish. Visiting does not grant permission to edit.

Share the build link only with people you want to build alongside you.

How can I test multiplayer by myself?

Open the same room link in a separate private or incognito browser window. Join there as a guest or with a different account to test a second player.

Use the room's copy link action so both players join the same room. Two tabs signed into the same account do not act as two separate players.

Your code and outside agents

Can I bring a game I already made?

Yes. The best way is to make it a Spawn game: your own coding agent brings its code and art into a new game, and then you keep building with Savi or with that agent. Bring a game you already made has the steps.

Can I bring my own coding agent?

Yes. In your game, type /agent in Savi's chat. Copy the one-time key and paste it into your coding agent, such as Codex or Claude Code. It joins as a builder and works on the same game files as Savi.

The one-time key works for ten minutes. Generate a new one if it expires. Your outside agent uses your own account with its service.

How do I reconnect or remove an agent?

If your agent lost its key, open Tokens & agents. Choose Reconnect, then copy the new key into that agent's session.

To bring the same agent into another game, type /agent in that game's chat and paste the one-time key into the agent's existing session.

Choose Unlink to remove its access to the games you manage. This does not delete the agent's own account or games.

Can I read, edit, or keep a copy of my game's code?

Yes. A Spawn 6 game has a Git repository, which holds its files and change history. Open your game's /code page, such as spawn.co/@yourname/your-game/code, to find its repository address and connect an agent.

You must own the game or have permission to edit it. Your agent can help you read the files, change them, and keep a local copy. Assets are referenced by name, so a copy of the code is not a bundle of every image, model, and sound.

Who owns my game and its assets?

Your game is yours. You can keep its code and build on it. Shared or third-party assets remain subject to their licenses, and generated assets may not be unique to your game.

See the Terms of Service for the rights that apply to your content and to Spawn.

Can I take my game to Steam or another engine?

An outside coding agent can help port your game to another engine or platform. It will need to adapt the code and features that depend on Spawn.

Spawn does not provide a ready-to-run Steam export, and Savi builds games for Spawn. Keeping a copy of your files is different from having a standalone game.

Friends, chat, and portals

How do I add friends or join them?

Press friends in your den, or open chats and choose friends, the first row. Type a friend's @name and press add friend. When they say yes, press invite to bring them to you, or portal to go to them. Whoever opens your link becomes your friend. On a computer, you can also hold Tab and press C to open chats.

In a game, press Invite in the bar, or type /invite in Savi's chat, to bring a friend to where you are. Send them your link, and they land beside you. You can also form a party to travel together.

How do text and voice chat work?

Open the people panel to talk with other players. Voice has controls to mute your microphone or deafen yourself. Open a person's menu to mute, block, or report them.

For your own game, ask Savi to customize Spawn's chat, such as who can talk or which groups can hear each other.

Can I connect games with portals or make a hub?

Yes. Ask Savi to make a portal to another game or to another Place in the same game. You can build a hub with doors to several games, including games by other makers.

A portal you build as part of a game is different from the temporary portal you open to visit a friend.

Can pets, items, and vehicles go through portals?

Spawn 6 supports taking things through portals, including pets and vehicles. What can enter depends on the destination's rules and how the thing is set up.

Tell Savi what you want to take across. Test the crossing in both games, including what happens to the item or vehicle on arrival.

Who can open a portal to me?

In Settings, set portal to me to friends or anyone. The default is friends. Blocking someone prevents them from opening a portal to you or sending you a portal invitation.

A portal appears in the game, so nearby players can use it too. The destination's entry rules still apply. Ask Savi to set those rules for your own game.

Publishing and updates

How do I publish my game?

Select Publish while editing. Follow the publishing panel to choose your cover and release the game. Once it is published, copy its play link and share it.

A published play link looks like spawn.co/@yourname/your-game.

Do players see every change as I build?

Visitors to your editing session can see the work in progress. The published play link opens the released version.

Publish an update when you are ready for players to get your changes. You can keep the same play link.

Where can I see how my game is doing?

While editing a published game, select Published or Publish update near the top right. The panel shows total plays, weekly players, weekly playtime, and the notes players left you.

How do I upgrade an older game to Spawn 6?

Open the engine version panel in your game. Choose Upgrade to 6.0, then confirm. The panel shows the result and anything that needs attention.

Try the important parts of the game after the upgrade. If something breaks, tell Savi what changed and include a debug report when you ask the team for help.

Can I return to the engine version I used before the upgrade?

For a game converted to Spawn 6, the engine panel can offer Back to v… for its previous version. Read the confirmation before proceeding.

A game created in Spawn 6 has no earlier engine version to return to. To undo changes within that game, use its change history instead.

Community

What is SpawnJam?

SpawnJam is the community game jam. Each jam has a theme, a start time, a deadline, and prizes. Visit SpawnJam for the current rules, dates, and entry steps.

Read the current rules before building or submitting. They explain what you can prepare in advance and how judging works.

How do I join the Partner Program?

Partners are selected based on what they make. Share your game with the team in Discord and ask about the current program.

Can I charge players for access or subscriptions?

Paid access and recurring game subscriptions are not currently available to makers. For ways to take part in prize competitions, see the current SpawnJam.

Where can I get feedback or find people to build with?

Join the Spawn Discord. Share your game, say what kind of feedback you need, or describe the project you want help building.

Getting help

When should I ask Savi for a fix, and when should I report a bug?

Ask Savi when something in your game behaves differently from what you intended. Describe what you did, what happened, and what you expected. /debug can help start that investigation.

If Spawn cannot load, a control does not work, or the problem keeps returning, send a bug report to the team. Savi can report a problem too.

How do I send a useful bug report?

Use the bug-report button in Savi's chat, or open Settings and select bug report. Post the report in #bug-reports with:

• Your game's link.
• What you did just before the problem.
• What happened and what you expected.
• Your device and whether you used a browser or the app.

A screenshot or short video helps when the problem is visual.

What should I do if my game is slow or something will not load?

Reload once. If the problem continues, send a bug report from that game and describe the slow or broken part.

For a slow game, ask Savi to investigate the part that costs the most. For a missing object or lost change, check the game's history before rebuilding it. Tell the team if a saved version will not open.

what happens after this is youtube. not the cringe internet-pundit version of that comparison, the actual one. youtube didn't make everyone a great filmmaker — it made trying cheap enough that millions of people tried, and most were bad for years, and a meaningful fraction of those people, by watching each other and copying each other and getting torn apart in comments and trying again, became better filmmakers than the film-school graduates whose tuition could have paid for an apartment. the medium taught itself. there was no curriculum. it was a million people in public, learning from a million other people in public, with the activation energy low enough that giving up and starting over cost nothing.

spawn has to be that for games. there's no other way the medium gets a hundred times bigger, which it has to. right now there are about two thousand games shipped on steam in a year. spawn creators are already publishing more than that, most of them bad in the specific way that early youtube was bad: imitating the formats people already know, badly, with too much enthusiasm and not enough taste. that's correct. that's the early phase. taste is a community phenomenon — it doesn't get installed in anyone before they start, it grows from looking at what someone else made and quietly deciding what you'd have done differently.

what we want at the other end of this isn't infinite slop. it isn't a feed of disposable games engineered to keep someone tapping. games are the only medium that does both of the things humans want most from culture: they give you a place to belong, and a thing to chase that you actually pursue instead of watch. when you lead a guild in world of warcraft, the leadership is real even though the dragons aren't. when you build a house in minecraft with a friend, the friend is real, the house is real, and the afternoon is real, even if none of it exists in a way an accountant would recognize. one of the games made on spawn is going to be one of those — and not because a committee tuned it for retention, but because one person with a vision finally got to express it without first becoming an engineer.

my girlfriend is going to build her game. the mushrooms will be the exact right shade of brown. the soup will simmer convincingly. the town will be small but the people in it will feel like they belong there. a few hundred people will play it, a chunk of them strangers, and someone she's never met will message her at 1am to say she's still foraging. that is the medium working. the next person who makes a game on spawn will have seen hers and learned something from it. the person after that will have seen both. ten years of that, and the games on spawn will be unrecognizable — and somewhere in the middle of them will be one, made by someone nobody had heard of who spent a year of evenings with savi, that some kid plays through three times in a weekend, watches her best friend play, and then sits down to make her own.

Savi makes it a Spawn game, multiplayer and on phones. Then you keep building it by asking, while people play it.

HexGL, a three.js racing game, racing through towers by day; then the same game on Spawn; then someone asks Savi to make it night and light the track with neon, and the ship races on between cyan neon rails and magenta lights. (HexGL by Thibaut Despoulain, MIT license. One real Savi turn, about seven minutes.)

1. Paste one prompt into Claude Code or Codex, in your game's folder.
2. Savi makes it a Spawn game: the same levels and art, now multiplayer and on phones.
3. Real players try it. You see what they did.

What to leave behind

• Your multiplayer code. Every Spawn game is multiplayer on its own, so leave out your game's servers, rooms, lag prediction and player syncing.
• Your old engine and libraries. Your game moves onto Spawn's engine. Don't bring three.js, Phaser, Godot or another library along inside it.
• Your own servers and database. Spawn runs your game's servers and keeps your players' progress.

What comes across

Your game's rules, levels, controls, screens and art. Your pictures, models and sounds come across as they are. Your code is rewritten to run on Spawn's engine. A game made with three.js, Babylon, Phaser, Unity, Godot, GameMaker, Construct, RPG Maker and more can come across, 2D or 3D, as long as you have its source.

The Guest List

$250 grants for selected games that were live on another site first. A person on the Spawn team picks them from what real players did, within a week of the game going up, and says why either way. Grant terms.

Free, with hosting, multiplayer servers and Savi.