• M.A.D.
  • M.C.M. Software
  • Macmillan Ltd.
  • Made In Spain
  • Magic Bytes
  • Martech
  • Mastertronic
  • Mastertronic Plus
  • Maynard International Ltd.
  • Melbourne House
  • Merit Software
  • Microprose
  • Microvalue
  • Mikro-Gen
  • Mikrogen
  • Mind Games EspaŅA S.A. (In Spain)
  • Mirrorsoft
  • Mister Chip
  • Musical 1, S.A.