Sequels on letters
M, m
- MI 666
- MOCT
- Magic Circle 2014
- Maniaco
- Map Seduction
- Maple Leaf
- Marsipulami
- Martinengo Cup
- Marvelous
- Matta Crystal Maze
- Mazdaism Maze
- Maze of Death
- Maze of Terror
- Mechanically
- Medium Maze
- Medium Soko
- Merry Christmas 2004
- Merry Christmas 2006
- Messed Battle
- Mi Corazon
- Mimosensau
- Mind Block
- Mindless block Push
- Minimalcannon
- Mirror Aisle
- Mirror Matrix
- Mirror Mirror III
- Mirror Water Park
- Mirror or Sokoban?
- Mirrored Image
- Miss Pop 2001
- Molewright
- Monotonie
- Monthy Puzzle
- Morbid Bermuda
- More Flags
- More Than Just Walk Around
- Morning
- Mortal Portal
- Mostly Liquid
- Mount Everest
- Mountainous ExtremE
- Mournful Echoes
- Moving Bermuda
- Mr. Azar
- Muchas Gracias
- Mukozuke
- Multi Functional
- Multikolour