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.

Download pre-alpha Source on GitHub

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.

Multiplayer mayhem

Support for dozens of players in the same match and hundreds of units on screen
Instant feel

Server authoritative with local prediction makes de-sync an issue of the past while still maintaining competitive integrity.
Self-Hosted

Zero risk of public servers being shutdown and breaking the game
Legacy maps still play

Compatibility mode rolls the engine back so older maps keep working when the core updates.
AI-assisted creation

Map editor ships with an AI assistant — prompt your way to a working map.
Open assets

Share models, textures, and scripts. Remix community work and grow the Arcade together.