Free & Open-Source Unreal Engine Alternatives

AAA game engine with royalty-based licensing.

1. Godot Engine ↗ ★ PICKFOSSPRIVATE
   Free MIT-licensed 2D/3D engine.
   ●●●Hard · Open-source license
2. O3DE ↗ FOSSPRIVATE
   Open-source AAA engine (Amazon-backed).
   ●●●Hard · Covers most basics
3. Stride ↗ FOSSPRIVATE
   Open-source C# game engine.
   ●●●Hard · Covers most basics