Super Mario Bros. is a unathorized port of game (with same name) to Mega Drive. Altrough it was released by BMB, it was credited to KDS (Kudos).
Same as original game, but slower in PAL speed. You will defeat enemies, swim underwater, defeat boss, and got the ending. Ending is almost same as original.
- If you enter the same code as Felix the Cat port does, it will open "secret menu".
- This was another game to be credited to Kudos.
- Because title screen is the same, the Nintendo copyright is left intact. That's because they maybe converted whole NES game into Mega Drive game.