Super Mario World (commonly abbreviated SMW) is a platform game developed and published by Nintendo as a pack-in launch title for the Super Nintendo Entertainment System. It has gone on to become a tremendous critical and commercial success, becoming the best seller for the platform, with 20 million copies sold worldwide. Like in previous games in the Mario series, the plot involves Mario traversing different lands on a quest to rescue Princess Toadstool who has been kidnapped by Bowser. [source:wikipedia]