Super Mario Bros. 3: Mario Forever is a fan translation of the original Super Mario Bros game included in the Super Mario All-Stars set. This fangame was developed by Softendo to allow players to play the original Super Mario Brothers game with improved graphics and new features. It does, however, maintain the original story. The Mushroom Kingdom has been invaded by Bowser and the Koopa Troopas, turning many of its citizens into inanimate objects. The gang has also kidnapped Princess Peach to use as leverage against Mario. As Mario, you must traverse across the 8 worlds to save the princess and free the kingdom from evil.