Open Collective
Open Collective

Castle Game Engine

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


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Financial Contributions

Recurring contribution

Thank you for supporting the development of the engine! The engine, documentation, over 100 examples, view3dscene, forum, Discord chat and more are... Read more

Starts at
$5 USD / month

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Recurring contribution
Silver Sponsor

The sponsors on this level are also mentioned on our public page.

Starts at
$10 USD / month

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Golden Sponsor

In addition to the benefits from previous tiers, you are invited to a monthly meeting scheduled by Michalis only for sponsors on this tier. Please ... Read more

Starts at
$50 USD / month

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Custom contribution
Make a custom one-time or recurring contribution.

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Top financial contributors


GitHub Sponsors

$84.67 USD since Oct 2020



$57 USD since Oct 2021

Castle Game Engine is all of us

Our contributors 3

Thank you for supporting Castle Game Engine.


Transparent and open finances.

Contribution #743981
Contribution #675169

Credit from GitHub Sponsors to Castle Game Engine

Added funds #618985
Today’s balance

$51.89 USD

Total raised

$123.94 USD

Total disbursed

$72.05 USD

Estimated annual budget

$22.00 USD


Let’s get the ball rolling!

News from Castle Game Engine

Updates on our activities and progress.

7.0-alpha.2 release, GIC 2022 presentation, zillion of usability improvements, working on physics

Hello Open Collective supporters! A quick recap of various important things that happened lately around Castle Game Engine: We did...
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Published on October 11, 2022 by Michalis Kamburelis

Castle Game Engine News

Hello OpenCollective supporters! We don't (yet) repost Castle Game Engine news regularly on OpenCollective, so let me just make a summary of our recent endeavors :) We're busy finishing Delphi port of our engine. See...
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Published on November 30, 2021 by Michalis Kamburelis


We're developing Castle Game Engine, an open-source cross-platform (desktop, mobile, consoles) game engine for 3D and 2D games.

Your donations fund actual work on the engine. Right now we finance the time of Andrzej Kilijański so he can work on new engine features.

Engine features include:
  • We support a lot of 3D and 2D formats (glTF, X3D, Spine JSON, sprite sheets...). You can export to them from almost any 3D or 2D authoring software.
  • We are portable to a lot of platforms - desktop (Windows, Linux, macOS...), mobile (Android, iOS), console (Nintendo Switch), Raspberry Pi.
  • We have a lot of cool graphic effects. Physically-based rendering, shadows, mirrors, bump mapping, shader effects, gamma correction...
  • We have a visual editor to manage your projects and design user interfaces and game layouts. Underneath a command-line build tool can be used to cross-compile and package the projects in batch mode.
  • We are using Object Pascal, a modern Pascal dialect, with classes, generics etc. We have a Modern Object Pascal Introduction for Programmers so you can learn everything you need. We allow using FPC or Delphi as a compiler, and pretty much anything (like Lazarus or Delphi or Visual Studio Code) as an IDE.
  • We are also making view3dscene, which is a viewer for all the model formats we support. It is perfectly usable on it's own, as a browser for interactive 3D worlds created in glTF, X3D and other formats.
Please support the development of the engine, so that I can implement more features and support even more platforms! Thank you!

Our team