Mega Feefteen is a sliding square puzzle, a superset if the Feefteen Puzzle, One of the World's Best Known Puzzles.It consists of 9, 15, 24, and 35 numbered squares that are placed in a 3x3, 4x4, 5x5, and 6x6 leaving one position empty.

The goal is to reposition the squares from a given arbitrary starting arrangement by sliding them one at a time into the ordered configuration.