65		Triplane Turmoil (DOS, 1996)
64		Artman's Goplanes! (DOS, 1997)
64		AUTS - The Ultimate Stress Relief Game (DOS, 1995)
64		V-Wing (DOS, 1997)
63		A2: The Ultimate Sequel To AUTS - The Ultimate Stress Relief Game (DOS, 1998)
63		Wings of Thunder (DOS, 1994)
63		Microsoft Revenge of Arcade (Windows, 1998)
60		Island Wars 2 (Windows, 2004)
60		Jumpjet (DOS, 1990)
60		Harrier 7 (DOS, 1989)
55		Interpose (DOS, 1996)
54		Hugo (DOS, 1995)
53		Jets 'n' Guns (Windows, 2004)
51		Kaeon (DOS, 1992)
51		Luftrausers (Windows, 2014)
51		Xerix (DOS, 1992)
51		Jets 'n' Guns Gold (Windows, 2007)
50		Superman: The Man of Steel (DOS, 1991)
50		Sopwith (DOS, 1985)
50		Air Attack! (DOS, 1988)
50		Airheart: Tales of Broken Wings (Windows, 2018)
50		Nachtmission (Windows, 2018)
50		Sine Mora EX (Windows, 2017)
50		I.F.O (Windows, 2017)
50		F-16 Early Deployment Airstrike Force (DOS, 1984)
50		Sopwith (DOS, 1984)
50		Barnstorming (Windows, 2010)
50		Sine Mora (Windows, 2012)
50		Bomber: Steep Dive (Windows, 2004)
50		Canyon Bomber (Windows, 2010)
50		Flying Leo (Windows, 2005)
50		The Tuttles Madcap Misadventures (Windows, 2007)
43		Jetstrike (DOS, 1994)
43		Cuphead (Windows, 2017)
43		Tubular Worlds (DOS, 1994)
42		Stardust Galaxy Warriors: Stellar Climax (Windows, 2015)
42		P-47 Freedom Fighter (DOS, 1993)
42		Acceleration of Suguri 2 (Windows, 2018)
41		Atomik: RunGunJumpGun (Windows, 2016)
41		Cloudphobia (Windows, 2008)
40		DoveZ: The Second Wave (Windows, 2004)
40		Aliensurf (Windows, 2003)
40		Gravity Fight (Windows, 2003)
40		Metal Slug 5 (Windows, 2004)
40		Crazy Steam Bros II (Windows, 2015)
40		Starr Mazer: DSP (Windows, 2016)
40		BioMetal (Windows, 2016)
40		Striker (DOS, 1985)
40		Laser Disco Defenders (Windows, 2016)
40		A City Sleeps (Windows, 2014)
40		RocketsRocketsRockets (Windows, 2015)
40		Last Resort (Windows, 2008)
40		Out on a LEM (DOS, 1984)
40		Zangeki Warp (Windows, 2017)
40		Space Taxi 2 (Windows, 2004)

Notes: Games similar to Deep Fortress, Games like Deep Fortress, First Step Software, Inc., First Step Software, Inc., DOS, Action, Arcade, Shooter, Side view, Flight, Aviation, PC, Game Similarities.