99		Metal Gear Solid (Windows, 2000)
91		Metal Gear Solid V: Ground Zeroes (Windows, 2014)
90		Metal Gear: Survive (Windows, 2018)
80		Metal Gear (DOS, 1990)
66		Hitman 2: Silent Assassin (Windows, 2002)
65		Alias Underground Episode 9: Countdown (Windows, 2003)
65		Codename: Nina - Global Terrorism Strike Force (Windows, 2003)
65		Alias Underground Episode 7: Phase One (Windows, 2003)
65		Hitman: Contracts (Windows, 2004)
65		Alias Underground Episode 6: CIA Mission - Return To SD-6 (Windows, 2003)
65		XIII (Windows, 2003)
65		Alias Underground Episode 8: Breakout (Windows, 2003)
64		Alias Underground Episode 2: Mission - Turkish Embassy (Windows, 2002)
64		Alias Underground Episode 1: SD-6 Agent Training (Windows, 2002)
64		K. Hawk: Survival Instinct (Windows, 2002)
64		Chameleon (Windows, 2005)
64		Alias Underground Episode 3: Mission - Raid On SD-6 (Windows, 2002)
64		Alias (Windows, 2004)
64		Alias Underground Episode 4: The Circumference (Windows, 2002)
64		Alias Underground Episode 5: Turkish Embassy - CIA Countermission (Windows, 2002)
62		DMZ: North Korea (Windows, 2006)
61		Death to Spies (Windows, 2007)
61		Hitman: Absolution (Windows, 2012)
60		Chemical Warfare (DOS, 1997)
60		Clandestine (Windows, 2015)
60		Velvet Assassin (Windows, 2009)
60		Gravity (Windows, 1995)
60		CTU: Counter Terrorism Unit (Windows, 2016)
60		Death to Spies: Moment of Truth (Windows, 2009)
60		007: Legends (Windows, 2012)
60		Secret Agent: The Escape (DOS, 1996)
58		Tom Clancy's Splinter Cell (Windows, 2003)
55		Alias Underground Episode 10: Endgame (Windows, 2003)
54		Metal Gear Solid V: The Phantom Pain (Windows, 2015)
53		Project: Snowblind (Windows, 2005)
53		Stolen (Windows, 2005)
52		Tom Clancy's Splinter Cell: Blacklist (Windows, 2013)
52		Tek-Kids Flash-Ops: Mission: Sky Fortress (Windows, 2006)
52		Tek-Kids Flash-Ops: Mission: Data Island (Windows, 2006)
52		Tek-Kids Flash-Ops: Mission: Polar Challenge (Windows, 2006)
52		Tek-Kids Flash-Ops: Mission: Aqua Zone (Windows, 2006)
51		I.G.I-2: Covert Strike (Windows, 2007)
51		Tom Clancy's Splinter Cell: Conviction (Windows, 2010)
51		Stealth Bastard Deluxe (Windows, 2012)
50		Rambo: The Video Game (Windows, 2014)
50		Hour of Victory (Windows, 2008)
50		Code: R - From Gensokyo with Love (Windows, 2013)
50		Guy Spy and the Crystals of Armageddon (DOS, 1992)
50		Stealth Bastard: Tactical Espionage Arsehole (Windows, 2011)
47		No One Lives Forever 2: A Spy in H.A.R.M.'s Way (Windows, 2002)
45		Chrome (Windows, 2003)
45		The Operative: No One Lives Forever (Windows, 2000)
40		Industrial Killers (DOS, 1995)
40		Death Penalty: Beginning (Windows, 2017)
40		République (Windows, 2015)

Notes: Games similar to Metal Gear Solid 2: Substance, Games like Metal Gear Solid 2: Substance, Konami Computer Entertainment Japan, Inc., Konami of America, Inc., Windows, Action, Shooter, Stealth, Spy, Espionage, 1st-person, 3rd-person, Other, Mullet haircut, PC, Game Similarities.