Frequently asked questions

Yes, and completely. No paid tier, no subscription, no trial period, no revenue share, no watermark on anything you make. You do not need an account to build or to play.

No. It runs in your web browser — opening the page is the installation. The whole engine is a single HTML file, so there is nothing to set up, patch or keep updated.

No. There is no sign-up and no login anywhere in the product. Levels autosave into your own browser storage, and sharing works by URL rather than by account.

The source is readable in the repository and the engine is free to use, but the code is copyright Jarred Smith rather than released under an open-source licence. It is built on MIT and Apache-2.0 licensed libraries including three.js, Rapier and PeerJS.

Any reasonably modern browser with WebGL — Chrome, Edge, Firefox or Safari — on Windows, macOS, Linux, Android or iOS. It runs on phones and tablets with touch controls, and the engine scales its own rendering quality to hold a steady frame rate.

Once the page has loaded, yes — the engine keeps running without a connection and levels autosave into your browser. Model search and multiplayer need a connection, because they reach external services.

In your browser, on your machine. Nothing is uploaded unless you choose to submit a level to the community library. Export a level to a file if you want a backup you control.

No — there is no scripting language in the product. Behaviour is built with trigger volumes, a node-based logic graph, persistent variables and a dialogue editor. Here is how that works in practice.

First and third-person shooters, racing and driving, top-down twin-stick, and 2.5D side-scrollers, plus story and puzzle games built from NPCs, dialogue and triggers. Eight objective types are built in: eliminate, survival, extraction, defend, destroy, escort, puzzle and race.

Yes. Import .glb models, textures and audio, or search free models from Poly Pizza and Sketchfab from inside the editor. Characters that arrive without animations can be rigged and animated in the built-in animation editor.

Yes — co-op and PvP, peer-to-peer over WebRTC with a room code. Your level syncs to whoever joins, so there is no server to rent or run. Racing supports multiplayer too.

Yes. Levels chain into campaigns, variables carry between them, and you can author your own title screen and win/lose end screens.

A whole level compresses into a URL — send the link and it opens as a playable game in the recipient's browser, with nothing to download. You can also export it as a file, or submit it to the in-game community library.

No. Rumpus Engine publishes to the web. If native store or console export is a requirement, use a desktop engine such as Unity, Unreal or Godot — comparison here.

You do. Licences for imported assets follow whatever you imported; the engine collects attributions per level and shows them on an in-game credits screen, so your players can see them too.