64		Space Invaders: Anniversary (Windows, 2003)
64		Juno Nemesis Remix (Windows, 2003)
64		Cunyngas (Windows, 2003)
64		Hellhog XP (Windows, 2003)
64		ArkLight (Windows, 2005)
64		Robocop 2D 2: Robocop vs Terminator (Windows, 2005)
63		Space Renegades: The Series (Windows, 2006)
63		Betty Bad (Windows, 2002)
63		Veck (Windows, 2006)
63		Obliterate... (Windows, 2006)
62		Return to Sector 9 (Windows, 2007)
62		Space Strike (Windows, 2007)
61		Startron (Windows, 2000)
61		Thrustburst (Windows, 2008)
61		Attack of the Saucerman! (Windows, 2000)
60		The Galaxians (DOS, 1997)
60		Cyber Police (DOS, 1996)
60		Protector 2 (Windows, 2009)
60		Astro Tripper (Windows, 2009)
60		Starcom (DOS, 1997)
60		Invaders: Corruption (Windows, 2010)
60		Miner Wars Arena (Windows, 2012)
60		Rubicon (Windows, 2012)
60		X-Orbtek II (Windows, 2013)
60		They Came from Verminest '83 (Windows, 2012)
60		Metal Spawn (Windows, 2011)
60		Ion Assault (Windows, 2010)
60		Galaxi (DOS, 1996)
60		N2O Nitrous Oxide (Windows, 2015)
60		Nihilist (DOS, 1996)
60		The Orion Project (DOS, 1994)
60		TriBlaster (Windows, 2014)
60		Xenic (Windows, 1999)
60		Star Havoc (Windows, 1999)
60		Iljimae-jeon: Manpa Sikjeok-pyeon (DOS, 1994)
60		Hurdles (DOS, 1994)
60		Dionakra (Windows, 1998)
60		Rage Against the Machine (DOS, 1997)
60		Mighty Switch Force! Academy (Windows, 2015)
60		Verminian Trap (Windows, 2013)
55		Starship Conquer (Windows, 2004)
55		RoboCop 2D (Windows, 2004)
54		Front Mission Online (Windows, 2005)
54		ExZeus (Windows, 2003)
53		Mushihimesama (Windows, 2015)
53		Orbt XL (Windows, 2017)
52		Space Ace (Windows, 2007)
52		Hard Core (Windows, 2001)
52		Assault Heroes (Windows, 2007)
52		The Tuttles Madcap Misadventures (Windows, 2007)
51		V2000 (Windows, 1998)
51		ROM CHECK FAIL (Windows, 2008)
50		Fox Ranger 3: Last Revelation (DOS, 1997)
50		Saddies: Attack!! (Windows, 2017)
50		Space Ace (DOS, 1994)
50		Gran Vitreous (Windows, 2015)
50		Transformers: Revenge of the Fallen (Windows, 2009)
50		Epoch. (Windows, 2014)
50		Recoil (Windows, 1999)
50		Mitsurugi Kamui Hikae (Windows, 2013)
50		Starry (Windows, 2011)
50		Caladrius Blaze (Windows, 2017)
50		Space Ace (DOS, 1989)
50		GAMP (Windows, 2016)
40		Anceder (Windows, 2018)
40		Cyber Troopers Virtual On (Windows, 1997)
40		The Hive (Windows, 1995)
40		Cyberwar (DOS, 1994)

Notes: Games similar to Horizon X, Games like Horizon X, Crazy Hermit Games, Crazy Hermit Games, Windows, Action, Sci-Fi, Futuristic, Arcade, 3rd-person, Other, PC, Game Similarities.