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Unity game engine is seen as the top rival of the Unreal Engine because there is always a hot debate among fans which is the best of the two. Unreal is considered to be more solid for 3D games and better in the graphics department than Unity. Godot is an open-source game engine that is great for creating 2D games but it can also make 3D. The editor has a built-in tool called blueprints that instead of making you code, uses a visual system of nodes that you can drag around.