65		Dystopia (Windows, 2009)
64		Unreal Tournament (Windows, 1999)
63		CellFactor: Revolution (Windows, 2007)
63		Ion Maiden (Windows, 2018)
62		Black Ice (Windows, 2014)
62		TRON 2.0 (Windows, 2003)
62		Interphase (DOS, 1989)
62		Rat Hunter (Windows, 2006)
62		Neuro (Windows, 2006)
61		Deus Ex: Invisible War (Windows, 2003)
61		Requiem: Avenging Angel (Windows, 1999)
61		The Terminator: Future Shock (DOS, 1995)
61		Utopia City (Windows, 2005)
61		CyberMage: Darklight Awakening (DOS, 1995)
60		The Terminator: Rampage (DOS, 1993)
60		Corporation (DOS, 1991)
60		Sairento VR (Windows, 2016)
60		The Terminator 2029 (DOS, 1992)
60		XS (DOS, 1997)
60		MoodFood (Windows, 2018)
60		2084 (Windows, 2018)
60		Neon Valley: Revenge (Windows, 2018)
60		Blaster Cop (Windows, 2017)
60		Cyber Utopia (Windows, 2017)
60		InGame.exe (Windows, 2017)
60		William Shatner's TekWar (DOS, 1995)
60		Ghost in the Shell: Stand Alone Complex - First Assault Online (Windows, 2016)
60		AI Wars: The Awakening (Windows, 2000)
60		Neon Shadow (Windows, 2016)
60		Terminator 3: War of the Machines (Windows, 2003)
60		Devastation (Windows, 2003)
60		Merger 3D (Windows, 2016)
60		Chaser (Windows, 2003)
60		ReVOLUTION (Windows, 2002)
53		System Shock (DOS, 1994)
51		Liquidator 2: Welcome to Hell (Windows, 2005)
51		Project: Snowblind (Windows, 2005)
50		Ares Rising (Windows, 1998)
50		Gunmetal (Windows, 1998)
50		Gunmetal (DOS, 1998)
50		Slave Zero (Windows, 1999)
50		Advanced Battlegrounds: The Future of Combat (Windows, 2004)
50		Hardline (Windows, 1997)
50		Hardline (DOS, 1996)
50		Cyberia: Mission Norway (DOS, 1994)
50		Assault Rigs (DOS, 1996)
50		Pyrotechnica (DOS, 1995)
41		Urban Brawl: Action DooM 2 (Windows, 2008)
40		Heretic: Shadow of the Serpent Riders (Windows, 2007)

Notes: Games similar to Harmony, Games like Harmony, Windows, Action, Cyberpunk, Dark Sci-Fi, Shooter, 1st-person, id Tech 1, PC, Game Similarities.