Donate
1. Introduction
We are making an open-source game engine, 3D and 2D, with comfortable visual editor and a powerful API. We proudly cooperate with open standards (X3D, glTF, IFC). We like modern Pascal, continuous integration, being cross-platform (desktop, mobile, consoles, web). We’re passionate about open-source and free software and tools to design engaging stories in the form of computer games.
The primary goal of your donations is to give us time to spend on the engine development. More time translates to more features, faster. By 2024, Michalis Kamburelis, the lead engine developer, spent most of his life on the engine and doesn’t plan to stop :) Moreover, since May 2024, Michalis works on the engine full-time counting only on your support. So anything you can give is really appreciated!
The secondary goal of donations is to cover "service" costs. This includes cost of domains, own servers (Vultr), mail (and other Proton services) for [email protected] accounts, Google Play, Steam app, Apple membership (Castle Model Viewer Mobile on iOS), accounting and other costs.
2. How to donate
2.1. Patreon
The suggested method of donating is to support us on Patreon.
We offer a few perks, including these cool stickers!
2.2. Company cooperation
Since October 2025, Castle Game Engine is a formal Polish (EU) company. We’re open for cooperation.
Contact Michalis ([email protected]) and tell me what do you need. Support, priority fixes, consulting about engine usage? Specific engine features to meet your use-cases? We can discuss it all.
2.3. Open Collective
Another option is to support us on Open Collective. This is similar to Patreon. You can easily donate monthly or one-time.
2.4. GitHub Sponsors
Another option is to support us by becoming Castle Game Engine Sponsor on GitHub.
2.5. PayPal
You can donate using PayPal. You can pay using your credit card, or use your own PayPal account.
2.6. Crypto
We accept donations in various crypto-currencies:
You’re welcome to send me a mail ([email protected]) to make sure your funds are received and/or just to say hi! :)
To improve this documentation just edit this page and create a pull request to cge-www repository.
