Cross-platform (desktop, mobile, console, web) 3D and 2D game engine. Powerful visual editor. Support for open standards like glTF, X3D, IFC and more. Fast clean code using modern Pascal. Free and open-source.

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Comfortable visual designer and powerful code

Visual editor

Design 3D and 2D games and user interfaces (with automatic scaling, anchors). Build and deploy the same project for multiple platforms. Integrate with various IDEs (Visual Studio Code, Lazarus, Delphi...).

Components

A lot of components to design viewport contents (3D and 2D world, using scenes, cameras, navigation, primitives, lights...) and user interface (buttons, images, labels...).

Village scene with outlines in glTF from Sketchfab ( https://sketchfab.com/3d-models/ftm-0970f30574d047b1976ba0aa6f2ef855 by Luis Fernandez )

Lots of ways to define data

Use 3D models, 2D animations, sprite sheets. Great integration with authoring tools like Blender or shops like Sketchfab thanks to using open standards like glTF and X3D.

Real-time water with caustics, reflections, shadows

Graphic effects

Composable shader effects, shadows, mirrors, physically based rendering, bump mapping, gamma correction...

"Escape from the Universe" on Nintendo Switch

Cross-platform

Target any platform (desktop: Windows, Linux, macOS, FreeBSD, Raspberry Pi, mobile: Android, iOS, console: Nintendo Switch, web). Work on any desktop platform. VR is coming as a next target soon.

Clean and fast code

Native clean object-oriented programming language with modern Object Pascal. Fast builds, fast execution out-of-the-box.

Open source and friendly to continuous integration

Tooling friendly to continuous integration. Command-line build tool and Docker image. Ready files and documentation how to use with GitHub Actions, GitLab CI, Jenkins. Engine is completely open-source and can be used to make any (including proprietary) applications.

Latest news

Scene inspired by Metal Gear Solid from Sketchfab https://sketchfab.com/3d-models/chibi-gear-solid-a4ca0e3864e143af9bf1dffc7fc8029b

URL improvements: castle-config:/ protocol, use UriExists and FindFiles on any URL (including e.g. zip), TCastleMemoryFileSystem

June 28, 2025

Slides and example from Delphi Day 2025 presentation and after-thoughts (Afterwarp, shadow maps, BGFX and deferred rendering)

June 21, 2025

Shaders! Large new documentation how to use shaders with Castle Game Engine, and new "shader libraries" (for now: to convert world<->eye space comfortably), and new SetEffects methods

June 14, 2025

Xbox Controller used to control our Castle Game Engine demo

Game controllers (gamepads, joysticks) - new comfortable API, and example of walking and talking using gamepad from Delphi Summit 2025

June 8, 2025

We're a happy member of MacStadium Open Source Developer Program.
They provide us access to a remote Mac machine, we use it to develop our macOS and iOS targets.

Status of our servers.

This webpage is also open-source and we welcome pull requests to improve it.

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