Build it. Break it. Share it.

A free 3D game engine that runs in a browser tab. No install, no account, no code — and the finished game is a link.

Open the editor Watch it work

Desktop and mobile browsers. Nothing to download, at either end.

What it is

Rumpus Engine is a free, browser-based 3D game engine and level editor. You build games through a visual editor — no coding, no installation and no account — and share them as a URL that opens straight into a playable game. Shooters, racing, top-down and side-scrolling, with peer-to-peer multiplayer built in.

The Rumpus Engine editor: a 3D scene with a transform gizmo on a selected object and the model browser open

Build

Place it, don't program it

Sculpt terrain, drop in shapes, search thousands of free 3D models and set them down. Drag a gizmo or type exact numbers. Press P and you're playing — no build step, no compile, same session.

How building without code works →

The cinematics builder showing a camera path with control handles over a 3D scene

Direct

Cutscenes with real camera control

Author shots on a path with lens, focus, roll and easing, and preview the framing live while you tune it. The same editor handles branching NPC dialogue and a node graph for cause and effect.

A truck racing on a banked track built with the Rumpus Engine track builder

Play

Five genres, one editor

Arena shooters, snap-together racing circuits, top-down twin-stick, 2.5D side-scrollers and story levels — all from the same tools and the same level format. A racetrack and a firefight can share a world.

See it

Three minutes beats three paragraphs

100% Free In Browser 3D Game Engine

What it is and what it does, in one pass.

Level Build Timelapse

An empty scene to a finished level, sped up.

Auto rigging & animation editor

Rigging an imported character that shipped without animations.

Inside

What's in the box

Every screenshot below is the actual editor, not a mock-up.

A burning vehicle and enemy AI in a Rumpus Engine level
Enemies & botsArchetypes with their own behaviour, patrol routes, detection and waves.
A row of material preview spheres on terrain in the editor
Materials & terrainSculpt the ground, paint surfaces, tune roughness and metalness live.
A lit interior room with a checkered floor built in Rumpus Engine
Lighting & post-FXReal-time shadows, bloom, depth of field, motion blur, fog and weather.
First-person view holding a weapon beside a wooden crate
Weapons & feelPer-weapon models, damage, recoil, attachments and gunfire effects.

Why browser

The friction is the point

  • Nothing to install. No launcher, no SDK, no 10 GB download before your first cube.
  • Any machine. A school laptop, a locked-down work desktop, a borrowed Chromebook.
  • Your players don't download either. A level compresses into a link that opens as a game.
  • Multiplayer without a server. Peer-to-peer co-op and PvP on a room code.
  • And the honest limit: it publishes to the web, not to Steam or consoles. Here's when to use something else.

Open it and place one cube

Free, no account, nothing to download. If it isn't for you, close the tab.

Open the editor