Godot
Free and open-source game engine for 2D and 3D.
Godot is a fully open-source engine with its own GDScript (Python-like) and C# support. No royalties, no seat licences, no runtime fees — and the entire engine source is available on GitHub under the MIT licence.
Best for indie developers who want a capable, royalty-free engine with full source access and no vendor lock-in.
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Related Game Development tools
All alternatives →Cross-platform game engine for 2D, 3D, AR, and VR.
Best for indie developers who want to ship games on multiple platforms with the largest ecosystem of assets and learning resources.
AAA-grade game engine with photorealistic graphics.
Best for developers targeting high-fidelity 3D experiences — games, architectural viz, or film production.
Beginner-friendly 2D game engine used in iconic indie games.
Best for beginners and indie developers focused on 2D games who want fast iteration and a proven track record.