- Mable & The Wood (Xbox One)
- Mad Games Tycoon (Xbox One)
- Mad Max (Xbox One)
- Madden 21 (Xbox Series X|S)
- Madden NFL 13 (Xbox 360)
- Madden NFL 15 (Xbox 360)
- Madden NFL 15 (Xbox One)
- Madden NFL 16 (Xbox One)
- Madden NFL 17 (Xbox One)
- Madden NFL 18 (Xbox One)
- Madden NFL 19 (Xbox One)
- Madden NFL 20 (Xbox One)
- Madden NFL 21 (Xbox One)
- Madden NFL 25 (Xbox 360)
- Madden NFL 25 (Xbox One)
- Mafia III (Xbox One)
- Mafia: Definitive Edition (Xbox One)
- Mafia: Trilogy (Xbox One)
- MageQuit (Xbox One)
- Magic 2015 (Xbox One)
- Magic 2015: Duels of the Planeswalkers (Xbox 360)
- Magic 2015: Duels of the Planeswalkers (Xbox One)
- Magic Duels: Origins (Xbox One)
- Magnetic: Cage Closed (Xbox One)
- MagNets: Fully Charged (Xbox One)
- Magrunner: Dark Pulse (Xbox 360)
- Mahjong (Xbox One)
- Maid of Sker (Xbox One)
- Mainframe One (Xbox One)
- Maize (Xbox One)
- Majestic Nights (Xbox One)
- Maldita Castilla EX - Cursed Castile (Xbox One)
- Maneater (Xbox One)
- Manifold Garden (Xbox One)
- Manual Samuel (Xbox One)
- Marenian Tavern Story: Patty and the Hungry God (Xbox One)
- Mark of the Ninja: Remastered (Xbox One)
- Marlow Briggs and the Mask of Death (Xbox 360)
- Mars: Chaos Menace (Xbox One)
- Mars: War Logs (Xbox 360)
- Marvel Avengers: Battle for Earth (Xbox 360)
- Marvel Puzzle Quest: Dark Reign (Xbox 360)
- Marvel Puzzle Quest: Dark Reign (Xbox One)
- Marvel Vs. Capcom: Infinite (Xbox One)
- Marvel's Avengers (Xbox One)
- Masquerade: The Baubles of Doom (Xbox One)
- Mass Effect 2 (Xbox 360)
- Mass Effect 3 (Xbox 360)
- Mass Effect Legendary Edition (Xbox One)
- Mass Effect: Andromeda (Xbox One)
- Massive Chalice (Xbox One)
- Matter (Xbox 360)
- Max and the Book of Chaos (Xbox One)
- Max Payne 3 (Xbox 360)
- Max: The Curse of Brotherhood (Xbox 360)
- Max: The Curse of Brotherhood (Xbox One)
- Maximum Football 2019 (Xbox One)
- McDROID (Xbox One)
- MechaNika (Xbox One)
- Mecho Tales (Xbox One)
- Mega Coin Squad (Xbox One)
- Mega Man 11 (Xbox One)
- Mega Man Legacy Collection (Xbox One)
- Mega Man X Legacy Collection (Xbox One)
- Mega Man Zero/ZX Legacy Collection (Xbox One)
- Megaquarium (Xbox One)
- Megaton Rainfall (Xbox One)
- Mekabolt (Xbox One)
- Mekazoo (Xbox One)
- Mekorama (Xbox One)
- MelterMan (Xbox One)
- Memories of Mars (Xbox One)
- Meow Motors (Xbox One)
- Merchant of the Skies (Xbox One)
- Metagal (Xbox One)
- Metal Gear Rising: Revengeance (Xbox 360)
- Metal Gear Solid 5: Ground Zeroes (Xbox 360)
- Metal Gear Solid 5: Ground Zeroes (Xbox One)
- Metal Gear Solid HD Collection (Xbox 360)
- Metal Gear Solid V: The Phantom Pain (Xbox One)
- Metal Wolf Chaos XD (Xbox One)
- Metaloid: Origin (Xbox One)
- Metamorphosis (Xbox One)
- Metrico+ (Xbox One)
- Metro 2033 Redux (Xbox One)
- Metro Exodus (Xbox One)
- Metro Redux (Xbox One)
- Metro: Last Light (Xbox 360)
- Metro: Last Light Redux (Xbox One)
- Metropolis: Lux Obscura (Xbox One)
- Michael Jackson: The Experience (Xbox 360)
- Michael Phelps - Push the Limit (Xbox 360)
- Microsoft Flight Simulator (Xbox Series X|S)
- Microsoft Solitaire Collection (Xbox for PC)
- Middle-earth: Shadow of Mordor (Xbox 360)
- Middle-earth: Shadow of Mordor (Xbox One)
- Middle-earth: Shadow of War (Xbox One)
- Might & Magic: Clash of Heroes (Xbox 360)
- Mighty No. 9 (Xbox 360)
- Mighty No. 9 (Xbox One)
- Mighty Switch Force Collection (Xbox One)
- Miles & Kilo (Xbox One)
- Milo's Quest (Xbox One)
- Mimic Arena (Xbox One)
- Minecraft Dungeons (Xbox One)
- Minecraft: Story Mode (Xbox 360)
- Minecraft: Story Mode (Xbox One)
- Minecraft: Xbox 360 Edition (Xbox 360)
- Minecraft: Xbox One Edition (Xbox One)
- Minesweeper Genius (Xbox One)
- Mini Ninjas Adventures (Xbox 360)
- Mining Rail 2 (Xbox One)
- Minion Masters (Xbox One)
- Minit (Xbox One)
- Minute to Win It (Xbox 360)
- Mirror's Edge Catalyst (Xbox One)
- Mitsurugi Kamui Hikae (Xbox One)
- Mittelborg: City of Mages (Xbox One)
- Mixups by POWGI (Xbox Series X|S)
- MLB The Show 21 (Xbox Series X|S)
- Mochi Mochi Boy (Xbox One)
- Modern Tales: Age of Invention (Xbox One Version) (Xbox One)
- Molecats (Xbox One)
- Momodora: Reverie Under the Moonlight (Xbox One)
- Monaco: What's Yours Is Mine (Xbox 360)
- Monkey King Saga (Xbox One)
- Monkey Pirates (Xbox One)
- Monochroma (Xbox One)
- Monochrome Order (Xbox One)
- Monopoly Deal (Xbox 360)
- Monopoly Deal (Xbox One)
- Monopoly Plus (Xbox 360)
- Monopoly Plus (Xbox One)
- Monopoly: Family Fun Pack (Xbox One)
- Monster Boy and the Cursed Kingdom (Xbox One)
- Monster Buster Agency (Xbox One)
- Monster Energy Supercross - The Official Videogame (Xbox One)
- Monster Energy Supercross - The Official Videogame 2 (Xbox One)
- Monster Energy Supercross - The Official Videogame 3 (Xbox One)
- Monster Energy Supercross 4 (Xbox Series X|S)
- Monster Hunter: World (Xbox One)
- Monster Jam Steel Titans (Xbox One)
- Monster Jam Steel Titans 2 (Xbox One)
- Monster Sanctuary (Xbox One)
- Monster Train (Xbox One)
- Monster Truck Championship (Xbox Series X|S)
- Monster Viator (Xbox One)
- Moonglow Bay (Xbox Series X|S)
- Moonlighter (Xbox One)
- Moons of Madness (Xbox One)
- Mordheim: City of the Damned (Xbox One)
- Morkredd (Xbox Series X|S)
- Mortal Kombat 11 (Xbox One)
- Mortal Kombat X (Xbox One)
- Mortal Shell (Xbox One)
- Motion Explosion (Xbox 360)
- MotionSports (Xbox 360)
- MotionSports Adrenaline (Xbox 360)
- Moto Racer 4 (Xbox One)
- Motocross Madness (Xbox 360)
- MotoGP 13 (Xbox 360)
- MotoGP 14 (Xbox 360)
- MotoGP 15 (Xbox 360)
- MotoGP 15 (Xbox One)
- MotoGP 16: Valentino Rossi (Xbox One)
- MotoGP 20 (Xbox One)
- MotoGP 21 (Xbox Series X|S)
- MotoGP18 (Xbox One)
- MotoGP19 (Xbox One)
- Motorcycle Club (Xbox 360)
- Mount & Blade - Warband (Xbox One)
- MouseCraft (Xbox One)
- Moving Out (Xbox One)
- Mowin' & Throwin' (Xbox One)
- Mr. Pumpkin Adventure (Xbox One)
- Mr. Shifty (Xbox One)
- MudRunner (Xbox One)
- Mulletman and the Molemen (Xbox One)
- Munch Time 2 (Xbox One)
- Munchkin: Quacked Quest (Xbox One)
- Murder Miners (Xbox One)
- Murdered: Soul Suspect (Xbox 360)
- Murdered: Soul Suspect (Xbox One)
- Mushroom Quest (Xbox One)
- Music Racer (Xbox One)
- Must Dash Amigos (Xbox One)
- Mutant Football League (Xbox One)
- Mutant Year Zero: Road to Eden (Xbox One)
- MX Nitro: Unleashed (Xbox One)
- MX vs ATV All Out (Xbox One)
- MX vs. ATV Supercross (Xbox 360)
- MX vs. ATV Supercross Encore (Xbox One)
- MXGP 2019 - The Official Motocross Videogame (Xbox One)
- Mxgp Pro (Xbox One)
- MXGP2 (Xbox One)
- Mxgp3 (Xbox One)
- MXGP: The Official Motocross Game (Xbox 360)
- My Big Sister (Xbox One)
- My Friend Pedro (Xbox One)
- My Hero Ones Justice (Xbox One)
- My Monopoly (Xbox One)
- My Self Defence Coach (Xbox 360)
- My Time At Portia (Xbox One)
- Myst (Xbox Series X|S)
- Mystery Castle (Xbox One)
- Mystery Mine (Xbox One)