| Mortal Kombat: Special Forces (2000) | 2,390,906 | 788 |
| Mortal Online (2010) | 3,516,132 | 1,119 |
| Mortal Online 2 (2021) | 10,881,639 | 5,514 |
| Mortal Royale (2018) | 27,436 | 32 |
| Mortal Shell (2020) | 97,548,138 | 47,065 |
| Mortal Sin (2023) | 3,645,429 | 433 |
| Mortal Skies: Modern War Air Combat Shooter (2011) | 13,467 | 13 |
| Mortal Trap Dungeon (2024) | 39 | 1 |
| Mortal Vessel (2024) | 683 | 6 |
| Mortalis Meltdown (2024) | 0 | 0 |
| MORTALITY DECOMP. KILLERS (2025) | 0 | 0 |
| Mortanis Prisoners #1 (2023) | 33,188 | 54 |
| Mortar Mayhem (2001) | 2,328 | 12 |
| Morte Accendere (2023) | 0 | 0 |
| Mortimer and the Enchanted Castle (2005) | 3,403 | 6 |
| Mortimer and the Riddles of the Medallion (1996) | 8,969 | 10 |
| Mortimer Beckett and the Book of Gold (2017) | 115,887 | 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) | 97,025 | 46 |
| Mortimer Beckett and the Time Paradox (2008) | 93,096 | 91 |
| The Mortuary Assistant (2022) | 388,596,894 | 40,614 |
| Mortui: Outbreak Secrets (2024) | 6,334 | 44 |
| Mortville Manor (1986) | 50,414 | 72 |
| Mortyr (1999) | 2,571,205 | 423 |
| Mortyr II (2005) | 396,953 | 206 |
| Mos Speedrun (2011) | 16,731 | 33 |
| Mosa Lina (2023) | 4,273 | 2 |
| Mosaic (2019) | 4,806,317 | 1,914 |
| Mosaic Chronicles (2022) | 14,272 | 65 |
| 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 |
| Mosaica: Arboreal (2026) | 0 | 0 |
| 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) | 828,020 | 43 |
| Moscow to Berlin: Red Siege (2006) | 12,937 | 32 |
| Moses & Plato - Last Train to Clawville (2026) | 21,403 | 93 |
| MosGhost (2025) | 0 | 0 |
| Moshcave (2022) | 99 | 4 |
| Moshi Monsters (2008) | 19,394,907 | 1,158 |
| Moshi Monsters: Katsuma Unleashed (2013) | 89,201 | 23 |
| Moshi Monsters: Moshling Zoo (2011) | 290,581 | 65 |
| Moshi Monsters: Moshlings Theme Park (2012) | 114,154 | 54 |
| Moskow 2024 (2000) | 1,002 | 2 |
| Moss (2018) | 17,479,465 | 3,847 |
| Moss Destruction (2019) | 32,549 | 172 |
| Moss: Book II (2022) | 1,619,137 | 1,303 |
| Mossen Seikkailut (2020) | 39 | 1 |
| Mossfield Origins (2024) | 8,429 | 11 |
| Mossroot (2024) | 18,726 | 9 |
| Mossy Pixels (2023) | 2,279 | 13 |
| The Most Lecherous (2023) | 0 | 0 |
| Mostroscopy (2023) | 16 | 1 |
| MOT (1989) | 9,563,540 | 547 |
| Motamo (2025) | 0 | 0 |
| MOTAS (2001) | 2,639,951 | 165 |
| Motel Manager Simulator (2024) | 57,662,193 | 5,256 |
| Motel Nightmares (2025) | 0 | 0 |
| MoteMancer (2025) | 407 | 7 |
| Moth Cry (2024) | 0 | 0 |
| Moth Ma'am (2025) | 0 | 0 |
| Moth Planet (2024) | 2,313 | 10 |
| Mother 1+2 (2003) | 1,410,377 | 962 |
| Mother 3 (2006) | 107,163,957 | 28,434 |
| Mother Ghoul - The Curse of Unborns (2023) | 2,128 | 32 |
| Mother Hub (2025) | 143,674 | 171 |
| Mother Machine (2025) | 0 | 0 |
| Mother Russia Bleeds (2016) | 13,633,913 | 3,770 |
| Mother Simulator (2018) | 569,067,321 | 5,313 |
| Motherboard Under Attack (2022) | 9,735 | 161 |
