80		KOPS (Windows, 2001)
80		Waterstorm (Windows, 2008)
70		Dream Warrior (DOS, 1989)
70		Gravity Fight (Windows, 2003)
70		Rockman 8 (Windows, 2010)
70		Project: Starfighter (Windows, 2003)
70		The Eternal Castle (Windows, 2019)
70		Tommy's Lander (DOS, 1986)
65		Interpose X-mas Greetings (DOS, 1996)
60		Boss 101 (Windows, 2017)
60		Carnage in Space: Ignition (Windows, 2017)
55		Eradicator (DOS, 1996)
55		Xenophage: Alien BloodSport (DOS, 1996)
55		Meteor Rescue (DOS, 1996)
55		Stillhunt (DOS, 1996)
55		Firewind (DOS, 1996)
55		Cyber Police (DOS, 1996)
55		Hunter Hunted (Windows, 1996)
55		Gubble (Windows, 1996)
54		Universal Warrior (DOS, 1995)
54		Into the Sun: Projected Distruction (DOS, 1995)
54		Prototype (DOS, 1995)
54		SK-111 'Star Killer' (Windows, 1995)
54		Primal Rage (DOS, 1995)
54		The Day 5: Assault Dragon (DOS, 1995)
54		Starcom (DOS, 1997)
54		The Fourth Generation (DOS, 1997)
54		Meteor Mission (DOS, 1995)
54		Lazarus (DOS, 1997)
54		VanSlug: X Mission (DOS, 1995)
54		Realm (DOS, 1997)
53		Freddy (Windows, 1998)
53		Hurrican (Windows, 2007)
53		Galactic Patrol (Windows, 1998)
53		The Orion Project (DOS, 1994)
53		Hydorah (Windows, 2010)
53		Bit Blaster XL (Windows, 2016)
53		IAS (DOS, 1994)
53		Entity (DOS, 1994)
53		Xatax (DOS, 1994)
53		Hyperoid (Windows, 1994)
53		Thunder Zone (DOS, 1994)
53		The Day 4: Icarus (DOS, 1994)
53		Hurdles (DOS, 1994)
53		Illusion Blaze (DOS, 1994)
53		Super Beemger (DOS, 1994)
52		Shatter (Windows, 2010)
52		Giant Worlds (Windows, 1999)
52		Revolver360 Re:Actor (Windows, 2014)
52		Geu Nal-i Omyeon 3: Dragon Force (DOS, 1993)
52		MURI (Windows, 2013)
52		Dark Moon (DOS, 1999)
52		Jim Power: The Lost Dimension in 3D (DOS, 1993)
52		World Quest (DOS, 1993)
52		First Samurai (DOS, 1992)
52		Isin-Densin Zero (Windows, 1999)
52		Super Cyborg (Windows, 2014)
52		Solaris 1.0.4. (Windows, 2000)
52		Duke Nukem II (DOS, 1993)
52		Super Hydorah (Windows, 2017)
52		Fire Zone (Windows, 1999)
52		MAZ! (Windows, 2017)
51		Blood Money (DOS, 1990)
51		Dalek Attack (DOS, 1992)
51		The Angry Video Game Nerd Adventures (Windows, 2013)
51		Syder Arcade (Windows, 2012)
51		Space Vegetables (DOS, 1992)
51		Gunner 3 (Windows, 2000)
51		Alien Stars (Windows, 2008)
51		Awesomenauts (Windows, 2012)
51		Ace of Seafood (Windows, 2016)
50		Zheros (Windows, 2016)
50		Street Fighter X Mega Man (Windows, 2012)
50		Armed and Gelatinous (Windows, 2016)
50		Thrustburst (Windows, 2008)
50		Xenophage: Alien BloodSport (Windows, 2015)
50		Astro Tripper (Windows, 2009)
50		VectorMan (Windows, 2010)
50		Leave Home (Windows, 2010)
50		Gentrieve (Windows, 2010)
50		Journey to Silius (Windows, 2017)
50		The Cleaner (Windows, 2008)
50		Warside (Windows, 2015)
50		Glum Buster (Windows, 2009)
50		Anyman (Windows, 2012)
50		Eradicator (Windows, 2014)
50		Duke Nukum: Episode 2 - Mission: Moonbase (DOS, 1991)
50		Bob Morane: Science Fiction 1 (DOS, 1987)
50		Reflex Point (DOS, 1985)
50		Duke Nukum: Episode 1 - Shrapnel City (DOS, 1991)
50		Metroid Sigma (Windows, 2015)
50		Cyber Arena (Windows, 2017)
50		Captain Power and the Soldiers of the Future (DOS, 1988)
50		Side Arms Hyper Dyne (DOS, 1988)
50		Zappa Roidz (DOS, 1989)
50		Menace (DOS, 1989)
50		Duke Nukem (DOS, 1991)
50		Bullshot (Windows, 2016)
50		Duke Nukum: Episode 3 - Trapped in the Future (DOS, 1991)
50		Weapon of Choice (Windows, 2015)
50		Guardians of Orion (Windows, 2016)
50		Gaurodan (Windows, 2013)
50		BiFrost (Windows, 2013)
50		Duke Nukem (Windows, 2013)
50		Duke Nukem II (Windows, 2013)
50		99 Levels to Hell (Windows, 2013)
50		Dark Matter (Windows, 2013)
50		C-RUSH (Windows, 2014)
50		Putrefaction 2: Void Walker (Windows, 2017)
50		Gongbat (Windows, 2015)
50		Asteria (Windows, 2014)
50		DubWars (Windows, 2016)
50		Power-Up (Windows, 2014)
50		Hydorah (Windows, 2013)
50		Uriel's Chasm 2: Et (Windows, 2015)
50		Fren-ze (Windows, 2006)
50		Bright Memory: Episode 1 (Windows, 2019)
50		GFID Advanced Place: Project φ (Windows, 2001)
50		Intensity XS: ReCharge (Windows, 2001)
50		GraviTron (Windows, 2006)
50		Uriel's Chasm (Windows, 2014)
50		UFO-Hunt 2001 (Windows, 2001)
50		Intensity XS (Windows, 2001)
50		Blessed (Windows, 2007)
50		Battlezone: Combat Commander (Windows, 2018)
50		Alien Tequila (Windows, 2002)
50		BII-NARY: The War Against Pop-Ups (Windows, 2002)
50		Cat Girl without Salad: Amuse-Bouche (Windows, 2018)
50		Monadius (Windows, 2005)
50		Adagio (Windows, 2005)
50		Entrance Gate (Windows, 2002)
50		Robocop 2D 2: Robocop vs Terminator (Windows, 2005)
50		Steel Saviour (Windows, 2004)
50		Inescapable (Windows, 2013)
50		Solar 2 (Windows, 2011)
50		Killer Baby (Windows, 2006)
50		Alien Horde (Windows, 2003)
50		Nick Naster's eXtinction (Windows, 2003)
50		Varia (Windows, 2007)
50		Scalpers: Turtle & the Moonshine Gang (Windows, 2018)
50		Halo Zero (Windows, 2005)
50		Heckpoint (Windows, 2017)
50		WarMachine Overload (Windows, 2005)
50		Rising Eagle: Futuristic Infantry Warfare (Windows, 2007)
50		Zub (Windows, 2007)
50		Star Blaze (Windows, 2005)
50		Absolute Blue (Windows, 2005)
50		IO (Windows, 2007)
50		Shudder (Windows, 2018)
50		Major Havoc (Windows, 2010)
45		S.T.O.R.M. (DOS, 1996)
45		DOOM 2D (DOS, 1996)
45		Interpose (DOS, 1996)
45		Abductor (DOS, 1996)
45		Stargunner (DOS, 1996)
45		Q.A.D: Quintessential Art of Destruction (DOS, 1996)
45		CHAMP Galaxia (DOS, 1996)
45		Iron Man / X-O Manowar in Heavy Metal (DOS, 1996)
45		Abuse (DOS, 1995)
45		SideLine (Windows, 1996)
45		Galagatron (Windows, 1996)
45		Alien Rampage (DOS, 1996)
45		SideLine (DOS, 1996)
45		Flynn Sprint (DOS, 1996)
45		TIE Invaders (DOS, 1996)
44		Mono Space (DOS, 1997)
44		Avenger (DOS, 1997)
44		Blaster! (DOS, 1997)
44		CHAMP Invaders (DOS, 1997)
44		CHAMP Galagon (DOS, 1997)
44		Fox Ranger 3: Last Revelation (DOS, 1997)
44		Betamax (DOS, 1997)
44		Super Stupid Space Invaders (DOS, 1997)
44		Indecent (DOS, 1995)
44		Invaders 95 (Windows, 1995)
44		Fighter (Windows, 1995)
44		Industrial Killers (DOS, 1995)
44		Nebula Fighter (DOS, 1997)
44		Orbsters (Windows, 1997)
44		Mars Taxi (Windows, 1997)
44		Out of This World (DOS, 1992)
44		Turrican II: The Final Fight (DOS, 1995)
44		Arctic Moves (DOS, 1995)
44		Space Invaders (DOS, 1995)
44		Delvion Star Interceptor (DOS, 1995)
44		TAGAP 2: The Apocalyptic Game About Penguins 2 (Windows, 2011)
44		Violent Vengeance: The Universe Hero (DOS, 1995)
43		Akane (Windows, 2018)
43		Mega Man X3 (Windows, 1998)
43		Cyberwar (DOS, 1994)
43		Combatrobo Zakato (DOS, 1994)
43		N++ (Windows, 2016)
43		Evasive Maneuvers (DOS, 1994)
43		Bio Freaks (Windows, 1998)
43		Project-X (DOS, 1994)
43		Mega Man X4 (Windows, 1998)
43		Jets 'n' Guns (Windows, 2004)
43		Liero (DOS, 1999)
43		Iji (Windows, 2008)
43		TAGAP: The Apocalyptic Game About Penguins (Windows, 2007)
43		Mission Cobra 98 (DOS, 1998)
43		Mini Ghost (Windows, 2017)

Notes: Games similar to KOPS, Games like KOPS, DOS, Action, Sci-Fi, Futuristic, Arcade, Shooter, Real-Time, Side view, PC, Game Similarities.