65		X-Fire (DOS, 1991)
64		Starfire (DOS, 1992)
64		Galactic Battle (DOS, 1990)
64		Jackson City (DOS, 1990)
64		Giant Space Slug (DOS, 1990)
64		Kiloblaster (DOS, 1992)
64		Space Miner (DOS, 1990)
63		Earth Invasion (DOS, 1993)
63		Solar Winds: The Escape (DOS, 1993)
63		Solar Winds: Galaxy (DOS, 1993)
63		Mirage Thunder (DOS, 1993)
63		Major Stryker (DOS, 1993)
63		Jim Power: The Lost Dimension in 3D (DOS, 1993)
63		Xenon (DOS, 1989)
63		Hellraider (DOS, 1989)
63		Space Snake (DOS, 1989)
63		Alien Syndrome (DOS, 1989)
63		Blasteroids (DOS, 1989)
63		If It Moves, Shoot It! (DOS, 1989)
63		Zappa Roidz (DOS, 1989)
63		Starsiege: Tribes (Windows, 1998)
63		ROX (DOS, 1993)
63		Cogmind (Windows, 2017)
62		Total Carnage (DOS, 1994)
62		Kiloblaster 3 (DOS, 1994)
62		Mutant Storm (Windows, 2003)
62		Tunnel Divers (Windows, 2017)
62		The Orion Project (DOS, 1994)
62		Galaga 94 (DOS, 1994)
62		Kiloblaster 2 (DOS, 1994)
62		Kiloblaster 1 (DOS, 1994)
62		Traffic Department 2192 (DOS, 1994)
62		Crimsonland (Windows, 2003)
62		Everyday Shooter (Windows, 2008)
62		Ricochet Infinity (Windows, 2007)
62		Mr. Smoozles Goes Nutso (Windows, 2006)
62		Teleglitch (Windows, 2012)
62		Star Dust (DOS, 1988)
62		Waves (Windows, 2011)
62		Time Bandit (DOS, 1988)
62		Bedlam (DOS, 1988)
62		Speed Zone (DOS, 1988)
62		Star Hammer (DOS, 1994)
62		Assault Android Cactus (Windows, 2015)
62		Geometry Wars 3: Dimensions - Evolved (Windows, 2014)
62		Alien Swarm: Reactive Drop (Windows, 2017)
62		Ikaruga (Windows, 2014)
61		Xenon 2000: Project PCF (Windows, 2000)
61		Return of the Mutant Space Bats of Doom (DOS, 1995)
61		Raiden IV: OverKill (Windows, 2015)
61		Alien Stars (Windows, 2008)
61		Geometry Wars: Retro Evolved (Windows, 2007)
61		Neon Chrome (Windows, 2016)
61		Heat Signature (Windows, 2017)
61		Waves 2 (Windows, 2015)
61		Blacksea Odyssey (Windows, 2016)
61		SubSpace (Windows, 1997)
61		Threat (DOS, 1995)
60		xWUNG (Windows, 2007)
60		Velocity: Ultra (Windows, 2013)
60		Project Root (Windows, 2014)
60		Guardic (Windows, 2016)
60		Major Stryker (Windows, 2014)
60		Super Killer Hornet: Resurrection (Windows, 2014)
60		Space Strike (Windows, 2007)
60		Inferno+ (Windows, 2012)
60		Debrysis (Windows, 2008)
60		Varia (Windows, 2007)
60		Protoganda: Strings (Windows, 2007)
60		Polybius (Windows, 2007)
60		Space Renegades: The Series (Windows, 2006)
60		Clash'N Slash: Worlds Away (Windows, 2006)
60		Angelfish (Windows, 2006)
60		Bullet Candy (Windows, 2006)
60		Raiden III (Windows, 2006)
60		Miner Wars Arena (Windows, 2012)
60		Urban Uprising: Dark New World (Windows, 2006)
60		Caverns of Mimas (Windows, 2012)
60		Astro Fury (Windows, 2008)
60		Uriel's Chasm (Windows, 2014)
60		Star Defender 4 (Windows, 2007)
60		Scavenger (Windows, 2007)
60		Protoganda II (Windows, 2008)
60		Chicken Invaders: Revenge of the Yolk (Windows, 2006)
60		Fuck Space! (Windows, 2006)
60		Mars Miner (Windows, 2007)
60		Droid Assault (Windows, 2008)
60		Astro Tripper (Windows, 2009)
60		Razor2: Hidden Skies (Windows, 2010)
60		Bullet Candy Perfect (Windows, 2009)
60		Broken Pearl (Windows, 2014)
60		Pixel Space_ (Windows, 2015)
60		Crusaders of Space 2 (Windows, 2007)
60		Shoot 1UP (Windows, 2015)
60		Robotz DX (Windows, 2010)
60		Tachyon Project (Windows, 2015)
60		Marsh (Windows, 2010)
60		Vortex (Windows, 2015)
60		Blockships (Windows, 2016)
60		Biodrone Battle (Windows, 2015)
60		It came from space, and ate our brains (Windows, 2015)
60		Beat Hazard (Windows, 2010)
60		SYNSO:CE (Windows, 2010)
60		Battle Squadron (Windows, 2013)
60		Solar Flux (Windows, 2013)
60		Alien Assault (Windows, 2008)
60		Invaders: Corruption (Windows, 2010)
60		XO-Fighter (DOS, 1982)
60		Star Sword (Windows, 2008)
60		Space Shot (Windows, 2008)
60		Laser Cycle (DOS, 1983)
60		Orbit (Windows, 2015)
60		1337 Ship Deathmatch (Windows, 2009)
60		Squid Yes! Not So Octopus! (Windows, 2009)
60		Crimzon Clover: World Ignition (Windows, 2014)
60		Gum Drop: Celestial Frontier (Windows, 2009)
60		Verminian Trap (Windows, 2013)
60		Uriel's Chasm 2: Et (Windows, 2015)
60		Ion Assault (Windows, 2010)
60		SYNSO: Squid Harder! (Windows, 2009)
60		X-Orbtek II (Windows, 2013)
60		Raiden IV (Windows, 2015)
60		Hero (Windows, 2005)
60		When Clones Attack! (Windows, 2002)
60		Chase Ace 2 (Windows, 1999)
60		Chicken Invaders: The Next Wave (Windows, 2002)
60		Project GunViper (Windows, 2002)
60		Axia (DOS, 1998)
60		TerraFire (DOS, 1997)
60		Cho Ren Sha 68k (Windows, 2001)
60		Chicken Invaders (Windows, 2002)
60		Cunyngas (Windows, 2003)
60		Final Impact (DOS, 1998)
60		Deimos Rising (Windows, 2003)
60		Scrap Galaxy (Windows, 2017)
60		Arcadia (Windows, 2010)
60		Out 'M' Up (DOS, 2000)
60		Tyrian 2000 (DOS, 1999)
60		Crusaders of Space (Windows, 2006)
60		Nighthaw-X3000 (Windows, 2017)
60		Outbreak (Windows, 2001)
60		Protector (Windows, 2001)
60		Rocks (DOS, 1997)
60		Star Havoc (Windows, 1999)
60		SPIN (DOS, 1996)
60		Metaloids (Windows, 1999)
60		Starcom (DOS, 1997)
60		Rage Against the Machine (DOS, 1997)
60		Swarm Universe (Windows, 2017)
60		Day of Pigs (DOS, 1996)
60		SplayMaster (DOS, 1996)
60		Space Rescue (Windows, 2000)
60		Startron (Windows, 2000)
60		RayStorm (Windows, 2001)
60		Blast-off (Windows, 2017)
60		Space Haste (Windows, 2000)
60		Tyrian 2000 (Windows, 1999)
60		Bugatron (Windows, 2000)
60		Infantry (Windows, 1999)
60		Galactic Patrol (Windows, 1998)
60		Star Defender II (Windows, 2005)
60		Final Impact (Windows, 1998)
60		Clash'N Slash (Windows, 2005)
60		Destruction Carnival (Windows, 1997)
60		Battle-Girl (Windows, 1998)
60		Miner Wars 2081 (Windows, 2012)
60		Space Rocks 3D (Windows, 1996)
60		Panic Invaders (Windows, 2004)
60		Alien Outbreak 2: Invasion (Windows, 2007)
60		Communist Mutants From Space (Windows, 2005)
60		JASEM: Just Another Shooter with Electronic Music (Windows, 2017)
60		Scud: Industrial Evolution (Windows, 1997)
60		Jewel of Orion (Windows, 2005)
60		ArkLight (Windows, 2005)
60		Alien Breed Obliteration (Windows, 2005)
60		UwiTron (Windows, 2005)
60		Ultratron (Windows, 2005)
60		(Not) Just another Space Shooter (Windows, 2004)
60		Mutant Mahem (Windows, 2004)
60		Pawarumi (Windows, 2018)
60		Hail to the Chief (Windows, 2004)
60		Fobos (Windows, 2003)
60		Warblade (Windows, 2003)
60		Take No Prisoners (Windows, 1997)
60		Angriff vom Saturn (Windows, 2003)
60		Crimzon Clover (Windows, 2010)
60		Override (Windows, 2017)
60		Alienoid (Windows, 2004)
60		Robot King Part I: Rebooted and Ready (Windows, 2017)
60		Chase Ace (Windows, 1998)
60		Pteroglider (Windows, 2004)
60		Mutant Storm: Reloaded (Windows, 2012)
60		Blast (Windows, 2017)
56		Bomberman (DOS, 1992)
55		MegaDestroyer Frantis (DOS, 1991)
55		ANIMAC (DOS, 1991)
54		Destruction Zone (DOS, 1992)
54		Jetsons: The Computer Game (DOS, 1992)
54		Turn n' Burn (DOS, 1992)
54		Dunjax (DOS, 1990)
54		Xenon 2: Megablast (DOS, 1990)
54		StarMines II: Planet of the Mines (DOS, 1992)
54		Rath-Tha (DOS, 1992)
54		OverKill (DOS, 1992)
54		Xerix (DOS, 1992)

Notes: Games similar to Slordax: The Unknown Enemy, Games like Slordax: The Unknown Enemy, Softdisk Publishing, DOS, Action, Sci-Fi, Futuristic, Arcade, Shooter, Top-down, PC, Game Similarities.