Open source 2D and 3D game engine

Kaiju Engine

Build fast games in Go with a Vulkan renderer, a flexible editor, custom UI, physics, particles, animation, audio, and live shader iteration.

Start with editor Start without editor Build from source

Go Vulkan Windows Linux macOS Android

kaiju-editor / scene

2D 3D Physics Particles UI Audio

Choose your workflow

Visual editing or code-first control.

Use the editor for scenes, assets, and iteration, or work directly with the engine from Go. Both paths use the same runtime.

E

Start with the editor

A visual workspace for scenes, content, shader previews, and play testing.

• Integrated Go project workflow
• Stage, content, shading, VFX, and UI tools
• The editor itself runs inside Kaiju

Open guide -> Go

Start without the editor

Use Kaiju as a Go engine when you want direct control over runtime code.

• Write gameplay and systems in Go
• Use engine caches, entities, transforms, and drawings
• Bring your own project structure

Open guide ->

Latest updates

News

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Engine features

Everything you need to build games.

Kaiju combines a Go runtime with production-minded engine systems for rendering, tools, content, and fast iteration.

01

Editor

Build scenes and inspect assets in a visual editor powered by the engine.

02

Particles and VFX

Compose emitters into reusable particle systems for gameplay feedback.

03

Custom UI

Create retained-mode UI directly or with the HTML/CSS-like markup system.

04

Physics

Simulate 3D worlds with physics systems that integrate with entities.

05

Live shaders

Iterate on GLSL shader code and visualize changes without breaking flow.

06

Cross platform

Create on desktop and deploy to Windows, Linux, macOS, and Android.

Showcase

One runtime, multiple ways to create.

Editor overview

A visual workspace for scenes, assets, previews, and iteration.

Editor Scene and content workflow 2D Sprites, animation, and UI 3D Scenes, lighting, materials VFX Particles and effects Shaders Fast visual iteration

Developer velocity

Fast iteration from code to play.

Kaiju is designed for short feedback loops: edit gameplay, build quickly, launch, test, and keep creating.

Build from source

cd src
go build -tags="debug,editor,filedrop" -o ../ ./

../kaijuengine.com.exe

Cross platform

Create on desktop. Deploy across platforms.

Create on

WindowsLinuxmacOS

Deploy to

WindowsLinuxmacOSAndroid

Built for

2D games3D gamesToolsPrototypes

Start building

Download Kaiju and create your first project.

Start with the editor for visual development, or use the engine directly from Go for a code-first workflow.

Download latest build Read docs

1. 01
   Download Kaiju

   Grab the latest editor build or build the engine from source.

2. 02
   Create a project

   Set up your project, assets, scenes, and runtime configuration.

3. 03
   Build your first scene

   Add objects, materials, cameras, UI, physics, and effects.

4. 04
   Write gameplay in Go

   Use Go for systems, behavior, tools, and game logic.

Community

Help shape the future of Kaiju.

Follow development, contribute code, report issues, share projects, and connect with other developers building in Go.

GitHub Discord Sponsor

Sponsors

Thank you.

If you like what you see, please consider supporting Kaiju's continued development.

Name	GitHub