73		Transformers: Revenge of the Fallen (Windows, 2009)
70		ExZeus (Windows, 2003)
64		Ion Assault (Windows, 2010)
64		Miner Wars Arena (Windows, 2012)
64		Rubicon (Windows, 2012)
64		Invaders: Corruption (Windows, 2010)
64		They Came from Verminest '83 (Windows, 2012)
63		Verminian Trap (Windows, 2013)
63		Astro Tripper (Windows, 2009)
63		Protector 2 (Windows, 2009)
63		X-Orbtek II (Windows, 2013)
62		TriBlaster (Windows, 2014)
62		Thrustburst (Windows, 2008)
61		N2O Nitrous Oxide (Windows, 2015)
61		Space Strike (Windows, 2007)
61		Mighty Switch Force! Academy (Windows, 2015)
61		Return to Sector 9 (Windows, 2007)
60		The Orion Project (DOS, 1994)
60		Robocop 2D 2: Robocop vs Terminator (Windows, 2005)
60		Horizon X (Windows, 2004)
60		Space Renegades: The Series (Windows, 2006)
60		Veck (Windows, 2006)
60		ArkLight (Windows, 2005)
60		Attack of the Saucerman! (Windows, 2000)
60		Obliterate... (Windows, 2006)
60		Startron (Windows, 2000)
60		Hurdles (DOS, 1994)
60		Star Havoc (Windows, 1999)
60		Xenic (Windows, 1999)
60		Dionakra (Windows, 1998)
60		Starcom (DOS, 1997)
60		The Galaxians (DOS, 1997)
60		Rage Against the Machine (DOS, 1997)
60		Galaxi (DOS, 1996)
60		Space Invaders: Anniversary (Windows, 2003)
60		Hellhog XP (Windows, 2003)
60		Iljimae-jeon: Manpa Sikjeok-pyeon (DOS, 1994)
60		Cyber Police (DOS, 1996)
60		Juno Nemesis Remix (Windows, 2003)
60		Nihilist (DOS, 1996)
60		Betty Bad (Windows, 2002)
60		Cunyngas (Windows, 2003)
55		Starry (Windows, 2011)
54		Coffee Forever (Windows, 2010)
54		Mushihimesama (Windows, 2015)
53		Mitsurugi Kamui Hikae (Windows, 2013)
53		Orbt XL (Windows, 2017)
52		ROM CHECK FAIL (Windows, 2008)
52		Epoch. (Windows, 2014)
51		Gran Vitreous (Windows, 2015)
51		Space Ace (Windows, 2007)
51		The Tuttles Madcap Misadventures (Windows, 2007)
51		Assault Heroes (Windows, 2007)
51		V2000 (Windows, 1998)
50		Space Ace (DOS, 1994)
50		Ultratron (Windows, 2005)
50		RoboCop 2D (Windows, 2004)
50		Saddies: Attack!! (Windows, 2017)
50		Hard Core (Windows, 2001)
50		Caladrius Blaze (Windows, 2017)
50		Starship Conquer (Windows, 2004)
50		Fox Ranger 3: Last Revelation (DOS, 1997)
50		Recoil (Windows, 1999)
50		GAMP (Windows, 2016)
50		Space Ace (DOS, 1989)
50		Front Mission Online (Windows, 2005)
50		Day of the Viper (DOS, 1990)
44		Vectorman 2 (Windows, 2012)
40		Mega Man X4 (Windows, 1998)
40		Cyber Troopers Virtual On (Windows, 1997)
40		Anceder (Windows, 2018)
40		Cyberwar (DOS, 1994)
40		Slybots: Frantic Zone (Windows, 2016)
40		The Hive (Windows, 1995)
40		Mega Man 3: The Robots are Revolting (DOS, 1992)
40		Mega Man X5 (Windows, 2002)
40		Mega Man Legends (Windows, 2001)

Notes: Games similar to Metal Spawn, Games like Metal Spawn, Grey Alien Games, Windows, Action, Sci-Fi, Futuristic, Arcade, 3rd-person, Other, Robot, PC, Game Similarities.