65		Mutant Earth (DOS, 1997)
65		The Fourth Generation (DOS, 1997)
65		B.I.G. (DOS, 1997)
65		Starcom (DOS, 1997)
65		Dark Angael (Windows, 1997)
65		Lazarus (DOS, 1997)
64		Freddy (Windows, 1998)
64		Stillhunt (DOS, 1996)
64		Firewind (DOS, 1996)
64		Galactic Patrol (Windows, 1998)
64		Hunter Hunted (Windows, 1996)
63		VanSlug: X Mission (DOS, 1995)
63		Into the Sun: Projected Distruction (DOS, 1995)
63		Bit Blaster XL (Windows, 2016)
63		Tinertia (Windows, 2015)
63		Hydorah (Windows, 2010)
63		Solaris 1.0.4. (Windows, 2000)
63		Prototype (DOS, 1995)
63		Meteor Mission (DOS, 1995)
63		Black Zone (DOS, 1995)
63		The Day 5: Assault Dragon (DOS, 1995)
63		Fire Zone (Windows, 1999)
63		Isin-Densin Zero (Windows, 1999)
63		Iconoclasts (Windows, 2018)
63		Hurrican (Windows, 2007)
63		Dark Moon (DOS, 1999)
63		SK-111 'Star Killer' (Windows, 1995)
62		Entity (DOS, 1994)
62		IAS (DOS, 1994)
62		Gunner 3 (Windows, 2000)
62		Super Cyborg (Windows, 2014)
62		Revolver360 Re:Actor (Windows, 2014)
62		MURI (Windows, 2013)
62		The Orion Project (DOS, 1994)
62		Illusion Blaze (DOS, 1994)
62		Super Hydorah (Windows, 2017)
62		onEscapee (Windows, 2004)
62		Xatax (DOS, 1994)
62		MAZ! (Windows, 2017)
62		Stalker 1: Path of Fire (DOS, 1994)
62		The Day 4: Icarus (DOS, 1994)
62		Super Beemger (DOS, 1994)
61		The Angry Video Game Nerd Adventures (Windows, 2013)
61		Blood Money (DOS, 1990)
61		Awesomenauts (Windows, 2012)
61		Alien Stars (Windows, 2008)
61		Syder Arcade (Windows, 2012)
61		Intensity XS (Windows, 2001)
61		UFO-Hunt 2001 (Windows, 2001)
61		Duke Nukem II (DOS, 1993)
61		GFID Advanced Place: Project φ (Windows, 2001)
61		Jim Power: The Lost Dimension in 3D (DOS, 1993)
61		Intensity XS: ReCharge (Windows, 2001)
61		Geu Nal-i Omyeon 3: Dragon Force (DOS, 1993)
61		World Quest (DOS, 1993)
60		Duke Nukem (Windows, 2013)
60		Street Fighter X Mega Man (Windows, 2012)
60		Zub (Windows, 2007)
60		Duke Nukem II (Windows, 2013)
60		IO (Windows, 2007)
60		Spaceport Hope (Windows, 2016)
60		Mari0 (Windows, 2012)
60		Hydorah (Windows, 2013)
60		Snapshot (Windows, 2012)
60		No Time To Explain: Season 2 (Windows, 2011)
60		Astro Tripper (Windows, 2009)
60		Frozzd (Windows, 2007)
60		Glum Buster (Windows, 2009)
60		Warside (Windows, 2015)
60		Dig or Die (Windows, 2015)
60		Captain 'S': The Remake (Windows, 2009)
60		Saira (Windows, 2009)
60		Leave Home (Windows, 2010)
60		Uriel's Chasm 2: Et (Windows, 2015)
60		The Cleaner (Windows, 2008)
60		Cataegis: The White Wind (Windows, 2015)
60		Gentrieve (Windows, 2010)
60		VectorMan (Windows, 2010)
60		Varia (Windows, 2007)
60		Anyman (Windows, 2012)
60		Zappa Roidz (DOS, 1989)
60		Captain Comic II: Fractured Reality (DOS, 1990)
60		Duke Nukem (DOS, 1991)
60		Commander Keen: Invasion of the Vorticons (DOS, 1991)
60		Menace (DOS, 1989)
60		Blessed (Windows, 2007)
60		Bullshot (Windows, 2016)
60		Starquake (DOS, 1988)
60		Duke Nukum: Episode 3 - Trapped in the Future (DOS, 1991)
60		Duke Nukum: Episode 2 - Mission: Moonbase (DOS, 1991)
60		The Great Wobo Escape (Windows, 2017)
60		Heckpoint (Windows, 2017)
60		Journey to Silius (Windows, 2017)
60		Dalek Attack (DOS, 1992)
60		Duke Nukum: Episode 1 - Shrapnel City (DOS, 1991)
60		Space Vegetables (DOS, 1992)
60		Side Arms Hyper Dyne (DOS, 1988)
60		Captain Power and the Soldiers of the Future (DOS, 1988)
60		Power-Up (Windows, 2014)
60		DubWars (Windows, 2016)
60		Headlander (Windows, 2016)
60		C-RUSH (Windows, 2014)
60		Dark Matter (Windows, 2013)
60		BiFrost (Windows, 2013)
60		Megabyte Punch (Windows, 2013)
60		Asteria (Windows, 2014)
60		Reset 1-1 (Windows, 2016)
60		Reflex Point (DOS, 1985)
60		Bob Morane: Science Fiction 1 (DOS, 1987)
60		Metroid Sigma (Windows, 2015)
60		Weapon of Choice (Windows, 2015)
60		Shiftlings (Windows, 2015)
60		Gongbat (Windows, 2015)
60		Gaurodan (Windows, 2013)
60		Yury (Windows, 2014)
60		WarMachine Overload (Windows, 2005)
60		Monadius (Windows, 2005)
60		Steel Saviour (Windows, 2004)
60		Atomic Butcher (Windows, 2004)
60		Star Blaze (Windows, 2005)
60		Absolute Blue (Windows, 2005)
60		Halo Zero (Windows, 2005)
60		Robocop 2D 2: Robocop vs Terminator (Windows, 2005)
60		Adagio (Windows, 2005)
60		Inescapable (Windows, 2013)
60		Solar 2 (Windows, 2011)
60		Vintergatan: Rädda Jorden! (Windows, 2003)
60		Uriel's Chasm (Windows, 2014)
60		BII-NARY: The War Against Pop-Ups (Windows, 2002)
60		Entrance Gate (Windows, 2002)
60		Killer Baby (Windows, 2006)
60		Major Havoc (Windows, 2010)
60		Bud Redhead: The Time Chase (Windows, 2003)
60		Alien Horde (Windows, 2003)
60		Nick Naster's eXtinction (Windows, 2003)
60		Sideswipe: Project 053 II (Windows, 2003)
60		Fren-ze (Windows, 2006)
60		Alien Tequila (Windows, 2002)
60		Action Cyborg (Windows, 2006)
60		GraviTron (Windows, 2006)
55		Fox Ranger 3: Last Revelation (DOS, 1997)
55		CHAMP Invaders (DOS, 1997)
55		Betamax (DOS, 1997)
55		Mono Space (DOS, 1997)
55		Blaster! (DOS, 1997)
55		CHAMP Galagon (DOS, 1997)
55		Super Stupid Space Invaders (DOS, 1997)
55		Orbsters (Windows, 1997)
55		Nebula Fighter (DOS, 1997)
55		Judge Dredd (DOS, 1997)
55		Avenger (DOS, 1997)
54		Mega Man X3 (Windows, 1998)
54		TAGAP 2: The Apocalyptic Game About Penguins 2 (Windows, 2011)
54		Mission Cobra 98 (DOS, 1998)
54		Galagatron (Windows, 1996)
54		Alien Rampage (DOS, 1996)
54		DOOM 2D (DOS, 1996)
54		S.T.O.R.M. (DOS, 1996)
54		Interpose (DOS, 1996)
54		Abuse (DOS, 1995)
54		Stargunner (DOS, 1996)
54		Abductor (DOS, 1996)
54		SideLine (Windows, 1996)
54		KOPS (DOS, 1996)
54		CHAMP Galaxia (DOS, 1996)
54		Vigilance on Talos V (DOS, 1996)
54		Iron Man / X-O Manowar in Heavy Metal (DOS, 1996)
54		Mega Man X4 (Windows, 1998)
54		Flynn Sprint (DOS, 1996)
54		SideLine (DOS, 1996)
54		TIE Invaders (DOS, 1996)
53		U.R.B.A.N The Cyborg Project (DOS, 1999)
53		Delvion Star Interceptor (DOS, 1995)
53		Space Invaders (DOS, 1995)
53		LaserAge (Windows, 1999)
53		N++ (Windows, 2016)
53		Zeroth Zone (DOS, 1999)
53		Fighter (Windows, 1995)
53		Space Fortress (DOS, 1999)
53		Mini Ghost (Windows, 2017)
53		Cold Dreams (DOS, 1995)
53		Arctic Moves (DOS, 1995)
53		Alien Invaders 2000 (Windows, 1999)
53		Super Panda Adventures (Windows, 2013)
53		Genocide 2: Master of the Dark Communion (DOS, 1995)
53		Space Invaders (Windows, 1999)
53		Invaders 95 (Windows, 1995)
53		Out of This World (DOS, 1992)
53		TAGAP: The Apocalyptic Game About Penguins (Windows, 2007)
53		Iji (Windows, 2008)
53		Akane (Windows, 2018)
53		Jets 'n' Guns (Windows, 2004)
53		Copy Kitty (Windows, 2018)
53		Turrican II: The Final Fight (DOS, 1995)
52		Invaders From Neptune! (Windows, 2000)
52		Kero Blaster (Windows, 2014)
52		PixelShips (Windows, 2000)
52		Just Shoot The Thing! (Windows, 2000)
52		Gravity Force (DOS, 2000)
52		Freedom Planet (Windows, 2014)
52		Commander Keen: Robot's Revenge! (Windows, 2000)
52		Bionic Commando: Rearmed (Windows, 2008)
52		Sinaria: Lost in Space (DOS, 1994)
52		VVVVVV (Windows, 2010)
52		Combatrobo Zakato (DOS, 1994)
52		Operation Spacehog (DOS, 2000)
52		Operation Spacehog (Windows, 2000)
52		Rochard (Windows, 2011)
52		Gravity Force (Windows, 2000)
52		Abduction Bit (Windows, 2016)
52		Oscar (DOS, 1994)
52		Project-X (DOS, 1994)
52		3D Missile Madness (Windows, 2000)
52		Super Mutant Alien Assault (Windows, 2016)
52		Zak Zapper (Windows, 2000)
52		Pink Hour (Windows, 2014)
52		Juanito Arcade Mayhem (Windows, 2017)
52		Evasive Maneuvers (DOS, 1994)

Notes: Games similar to Realm, Games like Realm, Flair Software Ltd., Golden Zone, DOS, Action, Post-Apocalyptic, Sci-Fi, Futuristic, Platform, Shooter, Side view, PC, Game Similarities.