| Mortal Sin (2023) | 1,112,457 | 308 |
| Mortal Skies: Modern War Air Combat Shooter (2011) | 13,467 | 13 |
| Mortal Trap Dungeon (2024) | 0 | 0 |
| Mortal Vessel (2024) | 683 | 6 |
| Mortalis Meltdown (2024) | 0 | 0 |
| Mortanis Prisoners #1 (2023) | 33,183 | 54 |
| Mortar Mayhem (2001) | 2,323 | 11 |
| Morte Accendere (2023) | 0 | 0 |
| Mortimer and the Enchanted Castle (2005) | 3,118 | 6 |
| Mortimer and the Riddles of the Medallion (1996) | 8,510 | 6 |
| Mortimer Beckett and the Book of Gold (2017) | 115,886 | 150 |
| Mortimer Beckett and the Crimson Thief (2012) | 49,538 | 77 |
| Mortimer Beckett and the Lost King (2010) | 207,793 | 61 |
| Mortimer Beckett and the Secrets of the Spooky Manor (2007) | 96,993 | 45 |
| Mortimer Beckett and the Time Paradox (2008) | 92,898 | 91 |
| The Mortuary Assistant (2022) | 381,435,659 | 37,988 |
| Mortui: Outbreak Secrets (2024) | 6,333 | 44 |
| Mortville Manor (1986) | 50,382 | 72 |
| Mortyr (1999) | 2,571,045 | 419 |
| Mortyr II (2005) | 396,133 | 202 |
| Mos Speedrun (2011) | 16,731 | 33 |
| Mosaic (2019) | 4,779,929 | 1,852 |
| Mosaic Chronicles (2022) | 14,182 | 64 |
| Mosaic: Game of Gods (2016) | 8,320 | 33 |
| Mosaic: Game of Gods II (2018) | 8,882 | 7 |
| Mosaic: Tomb of Mystery (2006) | 5,284 | 15 |
| Mosaique Neko Waifus 2 (2020) | 13,190 | 17 |
| Mosaique Neko Waifus 3 (2020) | 7,449 | 17 |
| Mosaique Neko Waifus 4 (2021) | 30,461 | 21 |
| Mosaique Neko Waifus 5 (2022) | 4,277 | 16 |
| Mosby's Confederacy (2008) | 15,020 | 6 |
| Moscow Racer (2009) | 824,730 | 38 |
| Moscow to Berlin: Red Siege (2006) | 12,932 | 32 |
| Moshcave (2022) | 99 | 4 |
| Moshi Monsters (2008) | 19,382,562 | 1,141 |
| Moshi Monsters: Katsuma Unleashed (2013) | 89,198 | 22 |
| Moshi Monsters: Moshling Zoo (2011) | 290,579 | 65 |
| Moshi Monsters: Moshlings Theme Park (2012) | 113,865 | 48 |
| Moskow 2024 (2000) | 1,002 | 2 |
| Moss (2018) | 16,995,165 | 3,676 |
| Moss Destruction (2019) | 32,546 | 172 |
| Moss: Book II (2022) | 1,614,397 | 1,253 |
| Mossen Seikkailut (2020) | 39 | 1 |
| Mossfield Origins (2024) | 8,421 | 11 |
| Mossroot (2024) | 18,717 | 8 |
| Mossy Pixels (2023) | 2,279 | 13 |
| The Most Lecherous (2023) | 0 | 0 |
| MOT (1989) | 9,339,844 | 519 |
| MOTAS (2001) | 2,618,569 | 162 |
| Motel Manager Simulator (2024) | 57,193,733 | 4,847 |
| Moth Planet (2024) | 2,205 | 10 |
| Mother 1+2 (2003) | 1,362,198 | 954 |
| Mother 3 (2006) | 106,235,142 | 27,818 |
| Mother Ghoul - The Curse of Unborns (2023) | 2,114 | 31 |
| Mother Hub (2025) | 139,517 | 155 |
| Mother Russia Bleeds (2016) | 13,530,992 | 3,713 |
| Mother Simulator (2018) | 565,129,657 | 4,971 |
| Motherboard Under Attack (2022) | 9,735 | 161 |
| MOTHERGUNSHIP (2018) | 4,619,118 | 2,582 |
| MOTHERGUNSHIP + Tower of Guns (2018) | 382 | 2 |
| Motherless - Season 1 (2022) | 0 | 0 |
| MotherLoad (2004) | 10,755,516 | 315 |
| Mothers and Daughters (2024) | 52,540 | 15 |
| Mothlight (2017) | 93 | 2 |
| Mothmen 1966 (2022) | 79,940 | 299 |
| Motif (2017) | 382 | 3 |
| MotionSports (2010) | 2,268,741 | 63 |
| MotionSports Adrenaline (2011) | 522,406 | 97 |
| Motivational Hero (2021) | 35 | 1 |
| Motivational Hero Vol. 2 (2021) | 34 | 1 |
| Moto Chaser (2008) | 5,674 | 3 |
| Moto Extreme (1997) | 141,007 | 30 |
| Moto Knight (2024) | 52 | 1 |
| Moto Offroad Simulator (2022) | 556 | 4 |
| Moto Parkour (2024) | 96 | 3 |
