Spawn is a place to make multiplayer games through conversation. Bring an idea, build it with Savi, and invite friends to play. You can make 3D games, 2D games, or a mix of both.
You can connect games with portals, build alongside friends, and invite your own coding agents to help. Your game has editable files and a history of saved changes. You can keep building while other people play.
Yes. Creating and playing are free, and Savi is included. You do not need a separate AI subscription to build with her.
If you choose to bring an outside coding agent, you use your own account with that service.
Go to Create. Press Tab to open Savi's chat, or tap her face on a phone. Tell her what you want to make. Start with the part you want to play first, then build on it together.
Visit Download Spawn for the available desktop apps.
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.
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.
Inside a game, open Settings from the gear on the right. Select your name, enter the new name, and press Enter to save it.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Drop files into Savi's chat and tell her how you want to use them. Common formats include:
For a 3D model, a GLB with its textures included is the simplest file to share.
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.
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.
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.
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.
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.
Yes. Go to Create, open the menu on your game's card, and choose Duplicate. Use the copy to try a different direction.
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 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.
On a computer:
The bottom toolbar holds shapes, paths, brushes, and saved blueprints. You can also ask Savi to help with a selected object.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Partners are selected based on what they make. Share your game with the team in Discord and ask about the current program.
Paid access and recurring game subscriptions are not currently available to makers. For ways to take part in prize competitions, see the current SpawnJam.
Join the Spawn Discord. Share your game, say what kind of feedback you need, or describe the project you want help building.
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.
Use the bug-report button in Savi's chat, or open Settings and select bug report. Post the report in #bug-reports with:
A screenshot or short video helps when the problem is visual.
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.