Castle Game Engine vs Unity
Castle Game Engine
castle-engine.io
Unity
unity.comSide by side
| Figure | Castle Game Engine | Unity |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | — | Yes |
| Plans published | 1 | 8 |
| Spec score · Game Development Software | 8.6 (#12) | 8.7 (#10) |
| Spec score · Game Engine Software | 8.2 (#50) | 8.7 (#23) |
| Free plan | Yes | Yes |
| Integrations | The project lists Visual Studio Code, Lazarus, Delphi, Blender and Sketchfab among supported tools and services. | Unity Integrations connect Cloud Build, Cloud Diagnostics and Collaborate with webhooks, Discord, Slack and email. |
| Rendering | Graphics features include shader effects, physically based rendering, shadows, mirrors, bump mapping and post-processing. | The engine provides real-time lighting, shading and rendering-optimization tools that scale from mobile to high-end PCs. |
| Support | The maker invites questions and feedback on its forum and offers meetings with the engine lead to discuss use, bugs, feature requests and cooperation. | Unity directs users to its Issue Tracker and Editor bug reporting flow, while Pro includes expedited customer support and Enterprise includes dedicated support. |
Plans
Unity
- Free tierFree
- Pay-as-you-goPrice not published
- Pay-as-you-goPriced on request
- Unity PersonalFree
- Unity Pro$210 a month
- Unity Pro$2,310 a year
- Unity EnterprisePriced on request
- Unity IndustryPriced on request
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.