Tag
3 catalogue entries use this topic; each Project's license policy is labeled separately.
Free 2D and 3D game engine with no royalties
Godot ships a complete engine, editor, and export pipeline under the MIT licence, which means no royalties, no revenue thresholds, and no licensing conversation before a project starts.
Free C# framework for cross-platform 2D and 3D games
MonoGame is a free, open-source .NET framework for building desktop, console, and mobile games in C#, re-implementing the discontinued Microsoft XNA API as code-first building blocks with no scene editor.
Commercial game engine with the widest platform reach
Unity's advantage is distribution. Console certification, mobile export, XR headsets, and the middleware ecosystem around them are all solved problems, which is why studios keep choosing it even after several rounds of unpopular licensing changes.