A game designer going by the name of 525Leomas posted a video of his 8-week project to learn about video game development. Using the Unreal Engine 3, he managed to recreate World 1-4 from Super Mario Brothers into the engine. He calls it FPS Mario.
FPS Mario Powered by the Unreal Engine
8-week project to learn about video game development leads to World 1-4 from SMB being recreated with the power of the Unreal Engine.