69%Strong matchs&box
58%9k58% positive reviews, Mixed across 9k reviews·Sandbox · Game Development
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The next-generation open-world multiplayer sandbox. Play community-made game modes, create addons with Lua scripting, import custom assets from Unreal Engine 5, and host your own dedicated servers for hundreds of players!
nanos world™
Steam








nanos world is the next-generation open world multiplayer sandbox. Inspired by the golden age of creative gaming such as Garry's Mod, SA-MP and FiveM, it provides the ultimate platform for players to enjoy unlimited variety and for creators to build their visions with the full power of Lua & Unreal Engine 5.
Whether you want to join a hardcore Roleplay (RP) server, compete in tactical shooters, or just mess around with physics-based contraptions, nanos world is whatever you make of it. With no predefined goals, the only limit is your imagination.
nanos world gives you direct access to modern engine features. Import your own FBX models, custom maps, and assets directly from the latest version of Unreal Engine 5 into the game.

We provide a fast, intuitive scripting API and a modern game-play framework, so you can focus on creativity instead of boilerplate code. Our complete Official Documentation provides everything you need to learn and start creating your packages right away! Created by developers for developers.

All Players can create, download and share their own Scripts, Packages, Addons, Maps and Models through the fully integrated Vault, which any server can easily import as UGC.

nanos world takes great inspiration from the golden sandbox games such as Garry's Mod, SA-MP, MTA and FiveM. We are big fans and grew up playing these. And we now have the great ambition to create a huge successor using cutting-edge technology, providing all the tools in a simple and very efficient way!
For Players:
For Developers:
We actively work to maintain a healthy environment in our community! All members are part of our family. We know how important it is to have an active, partnering community. No toxicity allowed! You won't be ridiculed for asking for help. We are here to help beginners become better developers!
Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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