| Title | Genre | Score | Release Date |
|---|---|---|---|
| Mass Effect | Action Role-Playing | 9.0 | May 28, 2008 |
| Mass Effect 2 | Action Role-Playing | 9.0 | Jan 26, 2010 |
| Mass Effect 2: Arrival | Action Role-Playing | 5.0 | Mar 29, 2011 |
| Mass Effect 2: Firewalker | Action Role-Playing | Mar 23, 2010 | |
| Mass Effect 2: Kasumi - Stolen Memory | Action Role-Playing | 6.5 | Apr 6, 2010 |
| Mass Effect 2: Lair of the Shadow Broker | Action Role-Playing | 8.5 | Sep 7, 2010 |
| Mass Effect 2: Normandy Crash Site | Action Role-Playing | Jan 26, 2010 | |
| Mass Effect 2: Overlord | Action Role-Playing | 8.5 | Jun 15, 2010 |
| Mass Effect 2: The Price of Revenge | Action Role-Playing | Jan 27, 2010 | |
| Mass Effect 3 | Action Role-Playing | 9.0 | Mar 6, 2012 |
| Mass Effect 3: Citadel | Action Role-Playing | Mar 5, 2013 | |
| Mass Effect 3: Earth | Action Role-Playing | Jul 17, 2012 | |
| Mass Effect 3: Extended Cut | Action Role-Playing | Jun 26, 2012 | |
| Mass Effect 3: Firefight Pack | Action Role-Playing | Aug 7, 2012 | |
| Mass Effect 3: From Ashes | Action Role-Playing | Mar 6, 2012 | |
| Mass Effect 3: Leviathan | Action Role-Playing | Aug 28, 2012 | |
| Mass Effect 3: Omega | Action Role-Playing | Nov 27, 2012 | |
| Mass Effect 3: Rebellion Pack | Action Role-Playing | May 29, 2012 | |
| Mass Effect 3: Reckoning | Action Role-Playing | Feb 26, 2013 | |
| Mass Effect 3: Resurgence Pack | Action Role-Playing | Apr 10, 2012 | |
| Mass Effect 3: Retaliation | Action Role-Playing | Oct 10, 2012 | |
| Mass Effect Trilogy | Compilation | Nov 6, 2012 | |
| Mass Effect: Bring Down the Sky | Action Role-Playing | Mar 10, 2008 | |
| Mass Effect: Pinnacle Station | Action Role-Playing | Aug 25, 2009 | |
| Massive Assault | Sci-Fi Turn-Based Strategy | 7.3 | Oct 28, 2003 |
| Massive Assault Network | Sci-Fi Turn-Based Strategy | 7.0 | Apr 13, 2004 |
| Massive Assault Network 2 | Sci-Fi Turn-Based Strategy | 2006 | |
| Massive Assault: Phantom Renaissance | Strategy | Nov 4, 2009 | |
| Master Levels for Doom II | Sci-Fi First-Person Shooter | Jun 1, 1995 | |
| Master Mind | Action | Canceled | |
| Master of Alchemy: Rise of the Mechanologists | Puzzle | Mar 9, 2013 | |
| Master of Defense | Real-Time Strategy | Apr 26, 2006 | |
| Master of Dimensions | Adventure | 1996 | |
| Master of Epic | Fantasy Online Role-Playing | Apr 1, 2005 | |
| Master of Magic | Fantasy Turn-Based Strategy | 1995 | |
| Master of Monsters III | Role-Playing | Jan 7, 2004 | |
| Master of Orion | Sci-Fi Turn-Based Strategy | 1993 | |
| Master of Orion 1+2 | Sci-Fi Turn-Based Strategy | Nov 22, 1996 | |
| Master of Orion II: Battle at Antares | Sci-Fi Turn-Based Strategy | 8.7 | 1996 |
| Master of Orion III | Sci-Fi Turn-Based Strategy | 6.7 | Feb 25, 2003 |
| Master Rallye | Rally / Offroad Racing | 7.9 | Apr 17, 2002 |
| Master Reboot | Puzzle | TBA | |
| Masterblazer | Sci-Fi First-Person Shooter | 1991 | |
| Mastermind | Action | 4.1 | Feb 28, 1998 |
| The Mastermind | Business Strategy | Jan 10, 2006 | |
| Masters of Belial | Action Role-Playing | 2008 | |
| Masters of Mystery: Crime of Fashion | Puzzle | Jan 6, 2009 | |
| Masters of the Broken World | Fantasy Turn-Based Strategy | TBA | |
| Masters of the Sky | Flight Simulation | 2004 | |
| Masters of the World, Geopolitcal Simulator 3 | Simulation | Mar 11, 2013 |
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