Steam Deck games: M
- #monstercakesPlayable
- M dollPlayable
- M.A.S.S. BuilderPlayable
- maboroshi caravanPlayable
- Macbat 64Playable
- macdows 95Verified
- MACHI KORO With EveryoneVerified
- Machiavelli the PrincePlayable
- MachickPlayable
- MachinariumVerified
- Machine Armor ZeroPlayable
- Machine Gun FuryPlayable
- Machine MindPlayable
- Machine PartyVerified
- Machine Tower 2984Playable
- MachinefallPlayable
- Machinika: AtlasPlayable
- Machinika: MuseumPlayable
- Machorium -Muscle Aquarium Simulator-Playable
- MACROSS -Shooting Insight-Playable
- Mad BulletsVerified
- Mad Experiments: Escape RoomVerified
- Mad FatherVerified
- Mad Games TycoonPlayable
- Mad Games Tycoon 2Playable
- Mad King RedemptionVerified
- Mad MaxVerified
- Mad MetalVerified
- Mad MoshPlayable
- Mad Smartphone TycoonPlayable
- Mad StreetsVerified
- Mad Television TycoonPlayable
- Mad Tower TycoonPlayable
- Mad TracksVerified
- MAD WAYPlayable
- Mad World SurvivorsPlayable
- Madballs in Babo:InvasionPlayable
- Madcap MosaicPlayable
- Made in Abyss: Binary Star Falling into DarknessPlayable
- Made MarionVerified
- MADiSONVerified
- Madness FantasyPlayable
- MADNESS: Project NexusPlayable
- MADO MONOGATARI: Fia and the Wondrous AcademyVerified
- Madohi Shiroki no KamikakushiVerified
- MadshotPlayable
- Madshot: Road to MadnessPlayable
- Madzik - Episode 1Playable
- MaelstromPlayable
- MAELSTROM LEGACY: The Tesla MysteryPlayable
- Maelstrom: The Battle for Earth Begins EnhancedPlayable
- Maestro's Cold War 2Playable
- Mafia Clicker: City BuilderVerified
- Mafia II: Definitive EditionPlayable
- Mafia III: Definitive EditionPlayable
- Mafia PigsPlayable
- Mafia: Definitive EditionPlayable
- Magazine MogulVerified
- Mage and MonstersPlayable
- Mage and Monsters IIPlayable
- Mage ArenaPlayable
- Mage MathPlayable
- Mage of the Olekta DesertPlayable
- Mage TowerPlayable
- MagecraftPlayable
- Magenta Horizon - Neverending HarvestPlayable
- MageQuitVerified
- Mages of MystraliaVerified
- Maggie's Movies - Camera, Action!Playable
- Magi TrialsVerified
- MagibrickPlayable
- Magic ArcheryPlayable
- Magic Cats PotsPlayable
- Magic FarmVerified
- Magic Forge TycoonPlayable
- Magic Griddlers 2Playable
- Magic InnPlayable
- Magic Lessons in Wand Valley - a jigsaw puzzle talePlayable
- Magic PaperPlayable
- Magic Potion MillionaireVerified
- Magic RampageVerified
- Magic ResearchPlayable
- Magic Research 2Playable
- Magic SwordPlayable
- Magic TechnologyPlayable
- Magic: The Gathering ArenaPlayable
- Magical BakeryPlayable
- Magical BlushPlayable
- Magical DelicacyVerified
- Magical Diary: Wolf HallVerified
- Magical Drop VIVerified
- Magical Eyes - Red is for AnguishPlayable
- Magical Girl CelesphoniaPlayable
- Magical Girl KonohaPlayable
- Magical Girl OpalPlayable
- Magical Girl Witch TrialsVerified
- Magical Girl Yusya-chan and the Labyrinth of LustPlayable
- Magical GreenhousePlayable
- Magical Hellhound LustPlayable
- Magical MassagePlayable
- Magical PrincessPlayable
- Magical Princess LilyPlayable
- Magical SwordmaidenPlayable
- MagiCatVerified
- Magicbook AutoBattler: ContractPlayable
- MagicCar of DeliciousPlayable
- MagicCraftPlayable
- MagickaPlayable
- MagicraftVerified
- MagicubePlayable
- Magin: The Rat Project StoriesVerified
- Magirune 2Playable
- MAGLAM LORDVerified
- MagnetoBottyPlayable
- MagnificoPlayable
- Magnir Saga Part 1Playable
- MagoVerified
- Magrunner: Dark PulsePlayable
- Mahjick - The Realm TakerPlayable
- MahjongPlayable
- Mahjong DeluxePlayable
- Mahjong Magic Journey 3Playable
- Mahjong NagomiVerified
- Mahjong Pretty Girls Battle : School Girls EditionPlayable
- Mahjong SoulPlayable
- Mahjongg Investigations: Under SuspicionPlayable
- Mahluk:Dark DemonPlayable
- Mahokenshi - The Samurai DeckbuilderPlayable
- Mahou ArmsVerified
- Mai and the Legendary TreasurePlayable
- Mai: Child of AgesVerified
- Maid Cafe on Electric StreetPlayable
- Maid for Loving YouPlayable
- Maid of SalvationVerified
- Maid of SkerPlayable
- Maiden and SpellVerified
- Maids of StormPlayable
- Mail Mole + 'Xpress DeliveriesVerified
- Mail TimePlayable
- MailPopPlayable
- Main AssemblyPlayable
- Mainframe DefendersPlayable
- MainFramesVerified
- MaitetsuVerified
- Maitetsu:Last Run!!Playable
- Maitetsu:Pure StationPlayable
- Majesty 2Playable
- Majesty 2 CollectionPlayable
- Majikoi! Love Me Seriously!Verified
- MajogamiVerified
- Major\Minor 2.0: (Re)VisionPlayable
- MajotoriVerified
- Makai Kingdom: Reclaimed and ReboundVerified
- Make Good ChoicesPlayable
- Make it indie!Playable
- Make It Rain: Love of MoneyVerified
- Make SailPlayable
- Make WayVerified
- MakeRoomVerified
- Making it HomePlayable
- Making*LoversVerified
- Making*Lovers: First BlushVerified
- Makis AdventurePlayable
- MAKOTO WAKAIDO’s Case Files TRILOGY DELUXEVerified
- Maktala: Slime LootfestPlayable
- Mala PetakaPlayable
- MalatzshiaVerified
- MalebolgiaPlayable
- Malice & GreedPlayable
- Malignant SurvivorsPlayable
- Malignant Survivors 2Verified
- Maliki : Poison Of The PastVerified
- Mall CrazePlayable
- MALL MANAGER SIMULATORPlayable
- Mall RivalsPlayable
- Mall SimulatorPlayable
- Mall TogetherPlayable
- Mall: Tidy Up TogetherPlayable
- MalónPlayable
- Maltese's Fluffy OnsenPlayable
- malViolence - Definitive EditionPlayable
- MalysPlayable
- MalyshkaPlayable
- Malzbie's Pinball CollectionPlayable
- Mama's Sleeping AngelsPlayable
- MamaShroomVerified
- MAMIYAVerified
- Mamon KingPlayable
- Mamorukun ReCurse!Playable
- Man I Just Wanna Go HomePlayable
- Man in a suit in a building in a cityPlayable
- Man O' War: Corsair - Warhammer Naval Battles (Classic)Playable
- Mana CyclePlayable
- ManabazPlayable
- ManafinderVerified
- ManaironsVerified
- MANDAGONPlayable
- MandalaPlayable
- Mandate Of HeavenPlayable
- MandemonPlayable
- Mandew vs the Forever Rain+Verified
- Mandragora: Whispers of the Witch TreeVerified
- ManeaterVerified
- ManeuverPlayable
- Manga Club Advisor wants to support Saeki SasaraPlayable
- MangoPlayable
- Mango's FishariumPlayable
- ManhuntPlayable
- ManiacVerified
- Maniac MansionPlayable
- Manic MechanicsVerified
- Manifold GardenVerified
- Manitas KitchenPlayable
- MannequinPlayable
- Manny'sPlayable
- Manor LordsPlayable
- Mansion RestoratorPlayable
- Mansions of MadnessVerified
- Mantis Burn Racing®Verified
- Manual Samuel - Last Tuesday EditionPlayable
- Manufactoria 2022Playable
- Manus DeiPlayable
- Many Mini Typing GamesPlayable
- Many Nights a WhisperVerified
- ManzakaPlayable
- Map Map - A Game About MapsPlayable
- MapleStory MPlayable
- MaquetteVerified
- Marauder of Dystopia: The weakest go to the wallPlayable
- Marble AgePlayable
- Marble CombatPlayable
- Marble It Up! UltraVerified
- Marble RacePlayable
- Marble RunPlayable
- Marble Run 2DPlayable
- Marble TrapVerified
- Marble WorldPlayable
- Marble's MarblesVerified
- March of EmpiresPlayable
- March of Industry: Very Capitalist Factory Simulator EntertainmentsPlayable
- March of ShroomsPlayable
- March of the LivingPlayable
- March to a MillionVerified
- Märchen ForestPlayable
- Märchen Forest: Mylne and the Forest Gift [Legacy ver.]Playable
- Märchen KannaPlayable
- Marenian Tavern Story: Patty and the Hungry GodVerified
- MareQuestPlayable
- MareQuest: An Interactive TailPlayable
- MarginCallPlayable
- Mariam GamePlayable
- Marie's RoomPlayable
- Marine QuestPlayable
- Marisa of Liartop MountainPlayable
- Marisa!ReturnTheBook!Playable
- Mark of CainPlayable
- Mark of the DeepVerified
- Mark of the NinjaVerified
- Mark of the Ninja: RemasteredVerified
- Mark's Magnificent Marble MazeVerified
- MARKET GARDENPlayable
- Market Simulator: Miami BeachPlayable
- Marko: Beyond BravePlayable
- Marle: The Labyrinth of the Black SeaPlayable
- Marlon’s Mystery: The darkside of crimeVerified
- Marlow Briggs and the Mask of DeathVerified
- Marry a Deep One: Innsmouth SimulatorPlayable
- MARS 2120Playable
- Mars AttractsPlayable
- Mars BasePlayable
- Mars First LogisticsVerified
- Mars HorizonPlayable
- Mars SurvivorsVerified
- Mars UndergroundPlayable
- Mars VicePlayable
- Mars: War LogsVerified
- Marshmallow All the Way HomePlayable
- Marsmare: AlienationPlayable
- MARSUPILAMI - HOOBADVENTUREVerified
- Marsupilami 2 - Salsa PalombiaVerified
- Martha Is DeadPlayable
- Marvel Contest of ChampionsPlayable
- MARVEL Cosmic InvasionVerified
- MARVEL MaXimum CollectionVerified
- MARVEL Puzzle QuestPlayable
- Marvel RivalsPlayable
- MARVEL SNAPPlayable
- MARVEL vs. CAPCOM Fighting Collection: Arcade ClassicsVerified
- Marvel vs. Capcom: InfinitePlayable
- Marvel's Guardians of the GalaxyPlayable
- Marvel's Midnight SunsPlayable
- Marvel's Spider-Man 2Playable
- Marvel’s Spider-Man RemasteredVerified
- Marvel’s Spider-Man: Miles MoralesVerified
- Mary Le Chef - Cooking PassionVerified
- Mary Skelter FinalePlayable
- MarZ: Tactical Base DefensePlayable
- Maseylia : Echoes of the PastVerified
- MASH VP! Re:VISIONPlayable
- MashedPlayable
- MashinaPlayable
- MashinkyPlayable
- Mask CityPlayable
- Mask of MistsPlayable
- Mask of SoulVerified
- Mask of the Plague DoctorPlayable
- Mask of the RoseVerified
- Mask QuestPlayable
- Masquerada: Songs and ShadowsPlayable
- Masquerade KissPlayable
- Masquerade: The Baubles of DoomVerified
- Mass Effect (2007)Playable
- Mass Effect™ Legendary EditionPlayable
- Mass Effect™: Andromeda Deluxe EditionPlayable
- MassiVerified
- Massive Assault: Phantom RenaissancePlayable
- Massive Cleavage vs Zombies: Awesome EditionPlayable
- Master Detective Archives: RAIN CODE PlusVerified
- Master Healer Kale with useless partyPlayable
- Master KeyVerified
- Master Lemon: The Quest for IcelandVerified
- Master MagistratePlayable
- Master of ChessPlayable
- Master of CommandPlayable
- Master of LunaPlayable
- Master of MagicPlayable
- Master of OrionPlayable
- Master of Orion 1Playable
- Master of PieceVerified
- Master Of PotteryPlayable
- Master of RealmsPlayable
- Master RebootPlayable
- Master RNGVerified
- Master SpyVerified
- MasteroidPlayable
- Masterplan TycoonPlayable
- Masterplan Tycoon: FoundationsPlayable
- MaSzynaVerified
- Match, Talk, Date! - A modern dating sim!Playable
- Match! The 12 CZ WarsPlayable
- Matchbox™ Driving AdventuresVerified
- Matching MeadowsVerified
- Matchmaker AgencyVerified
- Matchmaking Inc.Verified
- Matchpoint - Tennis ChampionshipsVerified
- MatchR: Now HiringPlayable
- MatchyGotchyPlayable
- Math & TopologyPlayable
- MATH EXPRESSionsVerified
- Math FunVerified
- Math Path BuilderPlayable
- MathletixVerified
- Mato AnomaliesVerified
- MATRESHKAPlayable
- Matsuro PaletteVerified
- Mausoleum of MemoriesPlayable
- Mausoleum of the MedusaPlayable
- Mavi's JourneyVerified
- MAVR3D 八般武艺Playable
- Max GentlemenVerified
- Max Gentlemen Sexy Business!Playable
- Max ManosPlayable
- Max Manos 2Verified
- Max MassacreVerified
- Max Payne 2: The Fall of Max PaynePlayable
- Max Payne 3Playable
- Max: The Curse of BrotherhoodVerified
- Maximum ActionPlayable
- Maximum FootballPlayable
- Maximum Pile-Up!Verified
- Maxwell's puzzling demonPlayable
- May's JourneyPlayable
- Mayday ProtocolPlayable
- Mayhem BrawlerVerified
- Mayhem in Single ValleyPlayable
- Mayhem ZXVerified
- Mayor May KnottVerified
- Mayor of DefenseVerified
- MAZAICAPlayable
- Maze and Fairy talePlayable
- Maze Creep!!Playable
- Maze KeeperPlayable
- Maze MiceVerified
- Maze pursuitPlayable
- MAZEBOUND: Hunt, Gather, Run!Playable
- Mazes and LabyrinthsPlayable
- Mazey VillageVerified
- McDROIDPlayable
- McPixelPlayable
- McPixel 3Verified
- MDKPlayable
- Mean BeansPlayable
- MeaninglessPlayable
- MEATPlayable
- MEAT 2Playable
- Meat Grinder: Hotdog SimulatorPlayable
- MEATGRINDERPlayable
- Mec Me LoffaPlayable
- MECCHA CHAMELEONPlayable
- Mech ArmadaVerified
- Mech BuilderPlayable
- Mech EngineerPlayable
- Mech FortressPlayable
- Mech HavocPlayable
- Mech vs. BugsPlayable
- Mecha AceVerified
- Mecha BREAKVerified
- Mecha Knights: NightmarePlayable
- MechabellumPlayable
- MechajammerPlayable
- Mechaneer Resta's Grand AdventurePlayable
- MechanibotVerified
- Mechanic 8230: Escape from IlgrotPlayable
- Mechanic HeroesVerified
- Mechanic MinerPlayable
- MECHANICA: A Ballad of the Rabbit and MercuryPlayable
- MechaNikaVerified
- Mechanines Tower DefensePlayable
- MecharashiPlayable
- Mechs & Mercs: Black TalonsPlayable
- MechWarrior 5: MercenariesPlayable
- MechWarrior Online™ LegendsPlayable
- Meco Rocket SimulatorPlayable
- Medal of Honor™Playable
- Medieval BlacksmithPlayable
- Medieval Crafter: BlacksmithVerified
- Medieval DynastyPlayable
- Medieval Fantasy Survival SimulatorPlayable
- Medieval Horse Dealer SimulatorPlayable
- Medieval Juice CrafterPlayable
- Medieval Kingdom WarsPlayable
- Medieval LegacyPlayable
- Medieval Life SimulatorPlayable
- Medieval Machines BuilderVerified
- Medieval StartUpPlayable
- Medieval: Total War™ - CollectionPlayable
- Mediterranea InfernoVerified
- Medved Hellraiser 3: Green ElephantPlayable
- Meeple IncrementalPlayable
- Meeple StationPlayable
- Meet Cute: Cafe 🐾Playable
- Meet Your MakerVerified
- Meet Your OshiPlayable
- Meg's MonsterVerified
- Mega City ForceVerified
- Mega KnockdownVerified
- Mega Mall StoryVerified
- Mega Mall Story 2Verified
- Mega Man 11Verified
- Mega Man Battle Network Legacy Collection Vol. 1Verified
- Mega Man Battle Network Legacy Collection Vol. 2Verified
- Mega Man Legacy CollectionVerified
- Mega Man Legacy Collection 2Verified
- Mega Man Star Force Legacy CollectionVerified
- MEGA MAN X DiVE OfflineVerified
- Mega Man X Legacy CollectionVerified
- Mega Man X Legacy Collection 2Verified
- Mega Man Zero/ZX Legacy CollectionVerified
- Mega MazeVerified
- Mega MosaicVerified
- Mega Quiz GamingPlayable
- Mega Sudoku - Binary & SuguruPlayable
- MegabonkVerified
- Megabyte PunchVerified
- Megacopter: Blades of the GoddessVerified
- Megadimension Neptunia VIIRPlayable
- MegalootPlayable
- Megamagic: Wizards of the Neon AgePlayable
- MegaquariumPlayable
- MegaSpherePlayable
- Megastore ChaosPlayable
- Megastore SimulatorPlayable
- Megastore: Tidy Up TogetherPlayable
- Megaton RainfallPlayable
- MeifumadoVerified
- MekazooPlayable
- MelatoninVerified
- Melissa K. and the Heart of Gold Collector's EditionPlayable
- Melo's cat cafePlayable
- Melody FriendsPlayable
- Melody of SeasonsPlayable
- Melody's EscapeVerified
- Melody's Escape 2Verified
- Melody's Melon ManiaPlayable
- MelonVerified
- Melon Journey: Bittersweet MemoriesPlayable
- Melt Them AllVerified
- MeltdownPlayable
- MeltopiaVerified
- Melty Blood Actress Again Current CodePlayable
- MELTY BLOOD: TYPE LUMINAVerified
- Melvor IdlePlayable
- Memary: Memory of the nameless onePlayable
- Membrillo Hid My SocksPlayable
- Meme MayhemVerified
- Meme Supreme ¯\_(ツ)_/¯Verified
- MemoiriumPlayable
- MEMOLITH: Forsaken by LightPlayable
- Memoria ArcanaPlayable
- Memorial Park of HypoxiaPlayable