| Mary Skelter: Nightmares (2016) | 2,814,979 | 4,371 |
| Mary-Kate and Ashley: Crush Course (2001) | 330,010 | 136 |
| Mary-Kate and Ashley: Girls Night Out (2002) | 224,368 | 34 |
| Mary-Kate and Ashley: Magical Mystery Mall (2000) | 1,217,702 | 124 |
| Mary-Kate and Ashley: Pocket Planner (2000) | 9,943 | 13 |
| Mary-Kate and Ashley: Winner's Circle (2001) | 1,093,490 | 100 |
| MarZ Rising (2017) | 219,613 | 86 |
| MarZ: Tactical Base Defense (2019) | 1,379,865 | 798 |
| MASAGORO (2021) | 12,558,477 | 1,002 |
| MASH VP! Re:VISION (2024) | 208,086 | 526 |
| Masha and the Bear: catch-up (2010) | 1,740,112 | 38 |
| Masha and the Bear: Preparing for school (2010) | 16,432 | 8 |
| Mashed: Drive to Survive (2004) | 489,101 | 253 |
| Mashinky (2017) | 5,432,525 | 3,076 |
| Mashiro Witch: Midnight Marchen (2017) | 37,742 | 24 |
| MASK (1987) | 16,237 | 22 |
| The Mask (1995) | 28,567,138 | 2,235 |
| MASK III: VENOM Strikes Back (1988) | 23,312 | 27 |
| Mask of the Plague Doctor (2020) | 2,740 | 30 |
| Mask of the Rose (2023) | 1,191,756 | 186 |
| The Mask of the Sun (1982) | 75,555 | 85 |
| Mask Quest (2024) | 26,754 | 32 |
| MASK Two Two (1987) | 8,176 | 10 |
| Masked Forces (2016) | 380,689 | 136 |
| Masked Forces 2: Mystic Demons (2017) | 104,779 | 19 |
| Masked Forces: Zombie Survival (2017) | 0 | 0 |
| The Masked Rider: Kamen Rider ZO (1994) | 113,573 | 49 |
| Masked Shooters 2 (2016) | 83,197 | 37 |
| Maskmaker (2021) | 2,669,584 | 409 |
| Maskonauts: Chat'Attack (2022) | 17 | 1 |
| Masks Of Deception (2022) | 2,232,278 | 66 |
| Maso Marble (2017) | 0 | 0 |
| Masochistic Elves from Another World (2021) | 8,573 | 4 |
| Mason and Strings (2021) | 0 | 0 |
| Mason: Building Bricks (2020) | 3,133 | 10 |
| Masou no Viator (2019) | 94,483 | 129 |
| Masquerada: Songs and Shadows (2016) | 637,130 | 871 |
| Masquerade Mysteries: The Case of the Copycat Curator (2010) | 4,079 | 4 |
| Masquerade: The Baubles of Doom (2016) | 266,115 | 196 |
| Mass Destruction (1997) | 9,559,768 | 1,181 |
| Mass Effect (2007) | 553,084,545 | 255,305 |
| Mass Effect 2 (2010) | 565,423,180 | 214,913 |
| Mass Effect 3 (2012) | 1,071,901,210 | 218,047 |
| Mass Effect 3: From Ashes (2012) | 37 | 2 |
| Mass Effect 3: Omega (2012) | 1,228,830 | 122 |
| Mass Effect Galaxy (2009) | 156,833 | 58 |
| Mass Effect Infiltrator (2012) | 48,803,463 | 2,999 |
| Mass Effect: Andromeda (2017) | 507,253,579 | 183,110 |
| Mass Effect: Pinnacle Station (2009) | 171,990 | 35 |
| MASS FOR THE DEAD (2019) | 2,979,062 | 1,730 |
| MASS FOR THE DEAD OVERLORD (2019) | 1,571,331 | 1,374 |
| Mass Harvest (2022) | 130,996 | 10 |
| Mass O' Kyzt (2018) | 0 | 0 |
| Massacre At The Mirage (2024) | 9,247,013 | 830 |
| Massira (2019) | 75,146 | 127 |
| Massive Air Combat (2019) | 22,711 | 26 |
| Massive Assault (2003) | 396,496 | 295 |
| Massive Assault Network 2 (2006) | 4,235 | 59 |
| Massive Chalice (2015) | 2,481,000 | 1,611 |
| Massive Defense (2024) | 68 | 3 |
| Massive Snowboarding (2005) | 11,191 | 15 |
| Mastema: Out of Hell (2017) | 3,180 | 18 |
| Master Arena (2022) | 25,918 | 99 |
| Master Blaster (2024) | 21,692,147 | 337 |
| Master Builder (2023) | 4,863,978 | 246 |
| Master Chess (1986) | 1,649,775 | 385 |
| Master Chu and the Drunkard Hu (1989) | 11,885,954 | 113 |
| Master Detective Archives: RAIN CODE (2023) | 16,604,310 | 11,734 |
| Master Detective Archives: RAIN CODE Plus (2024) | 125,375 | 657 |
| Master Key (2024) | 3,173,224 | 251 |
| Master Leaf Blower (2024) | 51,663 | 30 |
| Master Level Maker (2024) | 0 | 0 |
| Master Maker 3D Ultimate (2024) | 5,063 | 45 |
| Master Mind (1997) | 588,299 | 588 |
| Master Miner (1983) | 6,084 | 7 |
