Visual authoring
Build it in The Forge
Paint terrain, place armies and resources, then add rules with readable trigger sentences. You can test and publish from the browser without installing anything.
Open The Forge ↗Make the next custom game
Create a world of your own.
Start with a visual editor, an idea and an AI assistant, or the raw formats. The same validator and browser game sit underneath every route.
AI-assisted
Describe the game you want
Use an AI assistant to sketch a map, triggers or a mod, then bring the result into the editor and validate it before you play.
Read the AI creator guide →Manual and moddable
Code the data yourself
Maps are portable JSON and mods are .sosmod packages. Use the schemas, validator and API documentation when you want version control or a repeatable pipeline.
Explore maps and mods →Need inspiration first?
Play tower defenses, hero arenas, survival maps and other player-made worlds before you start building.
Browse custom games →