Super Mario Bros. Special is a follow-up to Super Mario Bros, originally released in Japan in 1986 for the home computer market. The game features 32 all new levels, 5 new enemies and 5 new power-ups. Due to limitations of the PC hardware, the game engine was quite poor in comparison to the Famicom/NES original. Most notable was the lack of scrolling; the PC version would instead show each screen one at a time. This port brings the levels, new enemies and power-ups back to the Famicom/NES engine. Also included are most of the unique background changes and other features not possible with the original SMB engine. The end result is a much more playable game that feels like a legitimate sequel.