Free to Play. Open-Source.
Classic arcade RTS. Built for makers.
Realm is an open-source engine for the fun, chaos, and creativity of classic custom maps. Play the Arcade, then publish your own.
Why Realm
Made for custom-map energy
Jump into Arcade chaos or host your own — less lobby waiting, more creating and playing, with tools that keep older maps alive.
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Multiplayer mayhem
Support for dozens of players in the same match and hundreds of units on screen
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Instant feel
Server authoritative with local prediction makes de-sync an issue of the past while still maintaining competitive integrity.
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Self-Hosted
Zero risk of public servers being shutdown and breaking the game
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Legacy maps still play
Compatibility mode rolls the engine back so older maps keep working when the core updates.
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AI-assisted creation
Map editor ships with an AI assistant — prompt your way to a working map.
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Community
Share models, textures, and scripts. Remix community work and grow the Arcade together.
Creator suite
Terrain, units, code — live-test as you build
Sculpt maps, place props, edit unit stats, and hot-reload to test. Editor includes an AI agent when you need help.
Download
Try the demo
Extremely early access. Unfinished product. Expect rough edges.
macOS and Linux builds aren’t published yet.
Donate to Realm
Fuel open-source game development
Realm is free and open-source. Donations directly fund game development.
GitHub Sponsors
Support monthly or make a one-time contribution.
PayPal
One-time contribution
Solana
USDT preferred
Build with the community
Connect with other players, submit feature requests, discuss map ideas, read editor tutorials, and more in Discord.