Super Mario Bros. X

Super Mario Bros. X (stylized as SMBX) is a Super Mario fan-game created by Andrew Spinks, who is also known as Redigit.

Why It Rocks

 * 1) The game itself was created by the same guy who made Terraria, which is also an awesome game.
 * 2) Completely free. There are no microtransactions or any kind of fees included in the game.
 * 3) It combines elements from Super Mario 1, 2 (Doki-Doki Panic), 3 and World, plus some elements from other various games. There are thousands of objects in the game.
 * 4) The editor is so easy to use, that you can make a whole Mario game without programming knowledge. Every Mario game is known as an "episode".
 * 5) Five playable characters. You can play as Mario, Luigi, Peach, Toad, and Link.
 * 6) The community is very friendly and creative. Most of the time, you will not be insulted, even if you don't like an episode most people do. Also, it is still active to this day.
 * 7) Tons of free episodes to choose from. Some of them are included when you download the base game.
 * 8) It takes very small disk space.
 * 9) Highly customizable. You can create custom power-ups and even the interface can be customized.
 * 10) It also has a two-player mode and a battle mode.

Bad Qualities

 * 1) For some reason, there is a glitch that if a mushroom (normal, 1-UP or poison) touches lava, the game will crash.
 * 2) Redigit has abandoned Super Mario Bros. X in favor of Terraria. Luckily, other people managed to keep SMBX alive.
 * 3) The selection does not contain all of the things found in the Super Mario games stated above.
 * 4) Much like Super Mario World, despite that the "lose a power-up" system was implemented in Super Mario Bros. 3, the game still lacks it for Mario and Luigi, making the game somewhat frustrating for long levels with tons of hazards.
 * 5) Although rare, some episodes are boring and unoriginal.