Region | Title | System | Version | Edition | Languages | Serial | Status |
| Mystery Legends: Sleepy Hollow | PC | 1.01 | Original | | 02-5602-10 | |
| Mystery Legends: The Phantom of the Opera | PC | | Collector's Edition | | 33383010US | |
| Mystery Legends: The Phantom of the Opera | PC | | Collector's Edition (Rerelease) | | 33383010US | |
| Mystery Masterpiece: The Moonstone | PC | 1.0 | Collector's Edition | | 02-0309-10 | |
| Mystery of Mortlake Mansion: 3 Game Pack | PC | | Cosmi | | CDR176D1, SJ032011 | |
| The Mystery of the Druids (Installation) | PC | 1.0.2.26 | Original | | CDR7045/US2 | |
| The Mystery of the Druids (The Past) | PC | 1.0.2.26 | Original | | CDR7045/US2 | |
| The Mystery of the Druids (The Present) | PC | 1.0.2.26 | Original | | CDR7045/US2 | |
| The Mystery of the Mummy | PC | 1.0 | Original | | PC39020CD DPV1.0 | |
| The Mystery of the Mummy | PC | 1.0 | Original | | | |
| The Mystery of Tooltown | PC | | Original | | | |
| Mystery P.I.: Lost in Los Angeles | PC | 1.0.0.2 | Original | | MPLL 09-00331 10/11 12-00125 | |
| Mystery P.I.: Stolen in San Francisco | PC | | Original | | MPSF-10-00700 11/10 10-00192 | |
| Mystery P.I.: The Curious Case of Counterfeit Cove | PC | | Original | | MPCC-11-01118 12/11 12-00102 | |
| Mystery P.I.: The Curious Case of Counterfeit Cove | PC | 1.0.0.42 | Original | | MPCC-11-01122 06/12 12-00164 | |
| Mystery P.I.: The London Caper | PC | | Rerelease | | MPLC-10-00500 05/10 10-00145 | |
| Mystery P.I.: The London Caper | PC | | Original | | MPLC-10-00500 05/10 10-00145 | |
| Mystery P.I.: The Lottery Ticket | PC | | Original | | | |
| Mystery P.I.: The Lottery Ticket | PC | 1.0.0.5 | Rerelease | | 0227 12/08 08-00124 | |
| Mystery P.I.: The Lottery Ticket | PC | 1.0.0.5 | Rerelease | | 0227 12/08 08-00124, P/N: 125329 | |
| Mystery P.I.: The New York Fortune | PC | | Original | | MPNY-09-00167 8/09 09-00256 | |
| Mystery P.I.: The Vegas Heist | PC | 1.0.0.3 | Original | | 0136 12/08 08-00143 | |
| Mystery Pack | PC | | Encore | | 31760-CD | |
| Mystery Solitaire: Secret Island Mystery Quest: Secret Island | PC | 1.0.0.9 | Original | | | |
| The Mystery Trio | PC | | Original | | P/N 6010604-CD | |
| Mystery Vault | PC | 1.0 | Original | | 02-9556-10 | |
| Mysteryville | PC | | Original | | 00120.101.US | |
| Mysteryville 2 | PC | | Original | | | |
| Mystic Towers | PC | 1.11 | Rerelease | | P/N 7088 | |
| Mystic Towers | PC | 1.11 | Original | | | |
| Myth II: Soulblighter | PC | | Linux | | | |
| Myth II: Soulblighter | PC | 1.0 | Original | | | |
| Myth II: Soulblighter | PC | 1.1 | Original | | | |
| Myth II: Soulblighter | PC | 1.3 | Rerelease, Myth: The Total Codex | | | |
| Myth II: Soulblighter: Exclusive Multiplayer Levels | PC | | Electronics Boutique | | | |
| Myth III: The Wolf Age | PC | 1.0 (build 134 Generic Release) | Original | | | |
| Myth: The Fallen Lords | PC | | Beta | | | |
| Myth: The Fallen Lords | PC | 1.2 | Rerelease | | | |
| Myth: The Fallen Lords | PC | Beta 4 | Review | | | |
| Myth: The Total Codex (Disc 1) (Installation Disc) | PC | | Original | | | |
| Myth: The Total Codex (Disc 1) (Installation Disc) | PC | 1.1 | Rerelease | | | |
| Myth: The Total Codex (Disc 2) (Myth: The Fallen Lords) | PC | | Original | | | |
| Myth: The Total Codex (Disc 2) (Myth: The Fallen Lords) | PC | 1.1 | Rerelease | | | |
| Myth: The Total Codex (Disc 3) (Myth II: Soulblighter) | PC | | Original | | | |
| Madden NFL 07 | PC | | Original | | 1522507 | |
| Madden NFL 08 | PC | | EA Sports 08 Collection | | 1683807 | |
| Madden NFL 08 | PC | 1.0.0.0 | Original | | 1535507 | |
| Made Man: Confessions of the Family Blood | PC | 1.0 | Original | | 11531-1DDA | |
| Maelstrom: The Battle for Earth Begins | PC | 1.0.0.11694 | Original | | MMAELCDUS00 | |
| Maestro Dual Pack: Music of Death & Notes of Life | PC | | Original | | 33404010US | |
| Mahjong: Titanium Collection | PC | | Original | | 37140-DVD | |
| Mahjongg Platinum 4 Mahjongg 4 Deluxe | PC | | Original | | | |
| Mamono Musume: Life with a Lamia | PC | 1.0 | Original | | JAST020 | |
| Marooned / Campfire Legends: The Hookman | PC | 1.0 | Original | | 29990-DVD | |
| Marvel: Ultimate Alliance | PC | | Original | | 32927.101.US | |
| Mass Effect 2 (Disc 1) | PC | 1.0 | Original | | 1598107 | |
| Massive Chalice | PC | | Kickstarter | | | |
| The Matrix: Path of Neo | PC | | Original | | Part # 26498DV | |
| Medal of Honor: Pacific Assault | PC | 1.0.0.1 | Cosmi, Director's Edition, 10th Anniversary | | 1490107, 1682957 | |
| Medieval II: Total War (Disc 1) | PC | | Original, Limited Edition | | | |
| Medieval II: Total War (Disc 2) | PC | | Original, Limited Edition | | | |
| Memento Mori | PC | | Original | | | |
| Men of War: Assault Squad | PC | | Original | | P/N 129022D1 | |
| Microsoft Flight Simulator X (Disc 1) | PC | 10.0.60517.0 | Beta | | | |
| Microsoft Flight Simulator X (Disc 1) | PC | 10.0.60813.1 | Preview | | | |
| Microsoft Flight Simulator X (Disc 1) | PC | 10.0.60905.0 | Original | | 0606 Part No.X12-50247-02 | |
| Microsoft Flight Simulator X (Disc 2) | PC | 10.0.60517.0 | Beta | | | |
| Microsoft Flight Simulator X (Disc 2) | PC | 10.0.60813.1 | Preview | | | |
| Microsoft Flight Simulator X (Disc 2) | PC | 10.0.60905.0 | Original | | 0606 Part No. X12-50248-02 | |
| Microsoft Flight Simulator X (Disc 1) | PC | 10.0.60905.0 | Deluxe Edition (Gold Edition) | | 06060 Part No. X12-50245 | |
| Microsoft Flight Simulator X (Disc 2) | PC | 10.0.60905.0 | Deluxe Edition (Gold Edition) | | 0606 Part No. X12-50246 | |
| Midnight Mysteries 4-Pack | PC | | Original | | 33550-DVD v1.0 | |
| Moebius: Empire Rising | PC | 3.5.7.45015 | Kickstarter Edition | | | |
| Moero Downhill Night | PC | | Original | | P016 | |
| Moero Downhill Night 2 | PC | | Original | | P017 | |
| Moero Downhill Night Blaze | PC | 1.0 | Original | | P018 | |
| Monkey Island Anthology (Disc 1) (The Secret of Monkey Island / Monkey Island 2: Le Chuck's Revenge) | PC | | Limited Run Games | | | |
| Monkey Island Anthology (Disc 2) (The Curse of Monkey Island / Escape from Monkey Island) | PC | | Limited Run Games | | | |
| Monopoly / The Game of Life | PC | | Original | | 12-CB65 09/12 12-00182 | |
| Monster Jam | PC | | Original | | 35447.101.US | |
| Moto GP 08 | PC | 1.1.0 | Original | | | |
| Mount & Blade: Warband | PC | | Original | | PDX5507US | |
| Murder, She Wrote | PC | 1.0 | Original | | 24351-CD v1.0 | |
| MySims | PC | 0.0.0.814 | Original | | 1910607 | |
| Myst | PC | 1.1 | 25th Anniversary Collection | | | |
| Myst III: Exile | PC | 1.27 | Limited Edition, 10th Anniversary DVD Edition, Myst IV: Revelation Limited Edition | | 651116-DVD3 | |
| Myst III: Exile | PC | 1.27.0 | 25th Anniversary Collection | | | |
| Myst V: End of Ages | PC | 1.0 | 25th Anniversary Collection | | | |
| Myst V: End of Ages | PC | 1.0 | Limited Edition | | 682523-DVD | |
| Myst: Masterpiece Edition | PC | | 10th Anniversary DVD Edition | | 651116-DVD1 | |
| Myst: Masterpiece Edition | PC | 1.0 | 10th Anniversary DVD Edition | | 651116-DVD1 | |
| Mysteries in Paradise | PC | 1.0.0B | Original | | | |
| Mystery 4 Pack: Volume 2 | PC | | Original | | | |
| Mystery 5 Collection (Disc 1) | PC | ARV 1.0 | Original | | DVD769CD | |
| Mystery 5 Collection (Disc 2) | PC | ARV 1.0 | Original | | | |
| Mystery Case Files: 13th Skull | PC | | Collector's Edition | | 33363101US | |
| Mystery Case Files: 13th Skull | PC | | Rerelease | | 33387010US | |
| Mystery Case Files: Dire Grove | PC | | Collector's Edition | | 35789.101.US | |
| Mystery Case Files: Shadow Lake Mystery Case Files 9: Shadow Lake with Lea Thompson | PC | | Collector's Edition | | 33432010US | |
| Mystery Case Files: Shadow Lake / Cursed Memories: Secret of Agony Creek | PC | | Original | | 33461010US | |
| Mystery Legends: Beauty & the Beast | PC | | Collector's Edition | | 33389010US | |
| Mystery Masters | PC | | Original | | | |
| Mystery Masters Volume 2 | PC | | Original | | | |
| Mystery Masters: Mystery 6 Pack | PC | | Original | | | |
| Mystery Masters: The Lake House: Children of Silence | PC | | Collector's Edition | | | |
| Mystery Masters: The Secret Stones Collection | PC | | Original | | | |
| Mystery Masters: Treasures of Mystery Collection | PC | | Original | | | |
| Mystery Trackers: Black Isle | PC | | Collector's Edition | | 33420010US | |
| Mafia II | PC | | Original | | 31408-1 | |
| Mafia II | PC | 1.0 | Original | | | |
| Mass Effect | PC | 1.0 | Original | | 1908107 | |
| Mass Effect 2 (Disc 2) | PC | 1.0 | Original | | 1598117 | |
| Mass Effect 3 (Disc 1) | PC | | Original | | 1958307 | |
| Mass Effect 3 (Disc 2) | PC | | Original | | 1958317 | |
| Medal of Honor | PC | 1.0 | Limited Edition | | 1535907 | |
| Medal of Honor: Airborne | PC | | 10th Anniversary | | 1682967 | |
| Medal of Honor: Airborne | PC | 1.0.1030.0 | Original | | 1528407 | |
| Medal of Honor: Warfighter (Disc 1) | PC | | Limited Edition | | 1971803301 | |
| Medal of Honor: Warfighter (Disc 2) | PC | | Limited Edition | | 1971803302 | |
| Medieval II: Total War | PC | | Gold Edition | | | |
| Medieval II: Total War: Gold Edition (Disc 1) | PC | | Original | | | |
| Medieval II: Total War: Kingdoms | PC | | Gold Edition | | | |
| Mercenaries 2: World in Flames | PC | 1.0 | Original | | 1572707 | |
| Metal Gear Solid 2: Substance | PC | | Original | | | |
| Microsoft Software Jukebox | PC | | Bundle Version HP OEM | | 0804 Part No. X10-88170 | |
| Minecraft: Story Mode: A Telltale Games Series: The Complete Adventure | PC | 2016.5.17.1283 | Original | | MCTCAPCNA | |
| Mini Ninjas | PC | 1.0 | Original | | | |
| Mirror's Edge | PC | 1.0.0.0 | Original | | 1538607 | |
| Myst IV: Revelation | PC | 1.3.0 | 25th Anniversary Collection | | | |
| Mystery Masters: Supernatural Stories (Disc 1) Mystery Masters: Supernatural Stories Collection | PC | | Collector's Edition | | 38800_DVD1 | |
| Mystery Masters: Supernatural Stories (Disc 2) Mystery Masters: Supernatural Stories Collection | PC | | Collector's Edition | | 38800_DVD2 | |
| Mystery Masters: Twisted Tales | PC | | Collector's Edition | | | |