A royalty-free game engine
Sell games without engine royalties. No revenue thresholds and no requirement to disclose your project’s source.

- No share of game revenue
- No required disclosure of your game source
- Modified runtime allowed in user products
Games are royalty-free. Selling the engine or distributing renamed versions requires permission.
Reckfell Engine License 1.0Related features
All features
A free game engine for 2D and 3D
Your game’s toolset: a 2D/3D editor, C# SDK, SharpGraph and rendering tools. Free for personal and commercial projects.

A game engine with source-code access
Study the engine, modify its tools and build your own version. Reckfell Engine License 1.0 permits source modification and free forks.

Reckfell: a Russian game engine
A Russian engine for 2D and 3D. C#, SharpGraph, world-building tools and Russian/English documentation. Release games for free, without royalties.
Questions and answers
Does revenue trigger engine payments?
The current license defines no such threshold for user products. Store/service charges are separate from engine royalties.
Can I sell my own engine fork?
Not under the general free grant: selling the engine needs separate permission. Free forks remain subject to the license.
Start building
Build and exportThe Reckfell community
News, source code and a direct line to the team.

Download Reckfell Engine
Windows x64, C#/.NET 10 and SharpGraph. Free for personal and commercial games.