Super Mario Bros. X
Super Mario Bros. X is a Mario fangame that combines elements from Super Mario 1, 2, 3 and World. It has many power-ups, such as the Ice Flower, the Hammer Suit, the Tanooki Suit, Kuribo's Shoe, the Billy Gun and Yoshi. You can also play the game with a friend in 2-player co-op mode, where the screen splits and connects seamlessly when players split up and reunite. This fangame is characterized above all by its extensive level editor, which allows you to create almost any type of level you can imagine. The game and engine were supported by the original creator until 2011.