Bitsy vs Castle Game Engine
Bitsy
bitsy.org
Castle Game Engine
castle-engine.ioSide by side
| Figure | Bitsy | Castle Game Engine |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| Plans published | 1 | 1 |
| Spec score · Game Development Software | 8.5 (#14) | 8.6 (#12) |
| Integrations | The official homepage links to Bitsy's editor, games on itch.io, documentation, a forum, an archive, Mastodon, and Codeberg. | The project lists Visual Studio Code, Lazarus, Delphi, Blender and Sketchfab among supported tools and services. |
| Purpose | Bitsy is a little editor for making games or worlds where players can walk around and talk to people. | Castle Game Engine is a cross-platform 3D and 2D game engine with a visual editor and Object Pascal API. |
| Support | The project documentation links to a bug reporting page and documentation contribution instructions. | The maker invites questions and feedback on its forum and offers meetings with the engine lead to discuss use, bugs, feature requests and cooperation. |
Plans
In their own words
Castle Game Engine
Castle Game Engine is a free, open-source engine for building 2D and 3D games with a visual editor and an Object Pascal API. The editor supports designing game worlds and interfaces, then building projects for multiple platforms. Listed targets include Windows, Linux, macOS, Android, and iOS, with mobile export, console export, and multiplayer tools. Graphics capabilities include shader effects, physically based rendering, shadows, mirrors, bump mapping, and post-processing. Supported formats include glTF, X3D, sprite sheets, and Spine 2D animations. The project lists Visual Studio Code, Lazarus, Delphi, Blender, and Sketchfab among supported tools and services. A command-line build tool, Docker image, and CI setup documentation support automation. The engine can be used for proprietary applications. Provided Linux binaries require GLIBC 2.34 or newer; older systems can compile from source. Supported operating systems must still receive vendor security support, with Windows 10 temporarily supported as of 2026.