Hack Your Game To Unlock The Secret Levels Of Super Mario Bros (15 pics + video)
The original "Super Mario Bros." has way more levels than you think and today you're going to find out how to unlock every single one of them.
There's one well-known secret world in the original 'Super Mario Bros.' — it's called the 'Negative World.'
It's just one of many of the hidden levels contained in "Super Mario Bros.," and it's perhaps the most widely known. You can reach it by performing an awkward backwards jump in the game's second level, 1-2, like so: