Super Mario 2 HD (also known as Super Mario Galaxy HD) is an illegal software developed by amateurs using the original name branch of the series started with Super Mario Brothers, Wii, where a classic 2D gameplay is kept but with three-dimensional graphics. Although it's not an actual emulator, it's developed using the Game Maker software and uses the Unity 3D engine. The developer claims it is the best free Android game and has more than 20 achievements. It can be downloaded from the official website. Some users may have to download a certain amount of files before playing. Super Mario Galaxy (developed by Retro Studios, who made other different games) and the sequel Super Mario Galaxy 2 are two different games and are released on Nintendo Wii, Xbox 360 and PlayStation3 respectively. The first game is much more advanced than its sequels. Both games are made to look similar, but the game mechanics are very different, making this a challenging game to play. The graphics are quite good and the game runs smoothly. Unlike many other versions of Mario games, Super Mario 2HD is entirely free for anyone to download, even though some of its features are hidden or limited to certain users. This is because this game was developed by amateur gamers and was not intended to be released as an actual, legal application. But despite being illegal, there is actually more popularity than expected. As with all free games, you will need to register to get hold of Super Mario 2HD. The reason for this is to gain access to the official website of this illegal downloader. After you've registered, you can then download the application by copying and pasting the program into your computer. After it's installed, you can start playing through the "New Game" option in the main menu. Since the game can be played on any device, you can also download it on your iPod Touch, Android smart phone or any other mobile devices that support the "Unity Engine." Super Mario is a series of games developed by Nintendo for use on its handheld consoles. This is one of their most popular and widely-used series of games and it's interesting to know how the history of this popular franchise came to be.