From newest to oldest from my History of M&M posted on another site:
Heroes of Might and Magic IV: Winds of War (2003), 3DO Company, The
Heroes of Might and Magic IV (2002), 3DO Europe, Ltd.
Heroes of Might and Magic IV: The Gathering Storm (2002), 3DO Company, The
Might and Magic IX (2002), 3DO Europe, Ltd.
Heroes Chronicles: The Final Chapters (2001), 3DO Company, The
Heroes of Might and Magic: Quest for the DragonBone Staff (2001), 3DO Company, The
Heroes Chronicles: Clash of the Dragons (2000), 3DO Company, The
Heroes Chronicles: Conquest of the Underworld (2000), 3DO Company, The
Heroes Chronicles: Masters of the Elements (2000), 3DO Company, The
Heroes Chronicles: Warlords of the Wastelands (2000), 3DO Company, The
Heroes of Might and Magic III Complete (Collector's Edition) (2000), 3DO Company, The
Might and Magic VIII: Day of the Destroyer (2000), 3DO Company, The
Heroes of Might and Magic III: The Restoration of Erathia (1999), 3DO Company, The
Heroes of Might and Magic (Millennium Edition) (1999), 3DO Company, The
Might and Magic VII: For Blood and Honor (1999), 3DO Company, The, Ubi Soft Entertainment Software
Heroes of Might and Magic II Gold (1998), 3DO Company, The
Might and Magic VI: The Mandate of Heaven (1998), 3DO Company, The
Heroes of Might and Magic II: The Price of Loyalty (1997), New World Computing, Inc.
Heroes of Might and Magic II: The Succession Wars (1996), 3DO Company, The
Heroes of Might and Magic (1995), Softgold Computerspiele GmbH
Swords of Xeen (1995), New World Computing, Inc.
Might and Magic: World of Xeen (1994), New World Computing, Inc.
Might and Magic: Darkside of Xeen (1993), New World Computing, Inc.
Might and Magic: Clouds of Xeen (1992), New World Computing, Inc.
Might and Magic III: Isles of Terra (1991), New World Computing, Inc.
Might and Magic II: Gates to Another World (1988), New World Computing, Inc.
Might and Magic: Book I (1987), New World Computing, Inc.