44		SFS-PC 2.0 (DOS, 1994)
43		Top Gun: Danger Zone (DOS, 1991)
43		Fighter Wing (DOS, 1995)
43		Black Knight: Marine Strike Fighter (DOS, 1995)
43		SimCopter (Windows, 1996)
42		Microsoft Flight Simulator for Windows 95 (Windows, 1996)
42		Stormovik: SU-25 Soviet Attack Fighter (DOS, 1990)
42		Fast Attack: High Tech Submarine Warfare (DOS, 1996)
42		Microsoft Flight Simulator 98 (Windows, 1997)
42		Back to Baghdad (DOS, 1996)
42		Das Hexagon-Kartell (DOS, 1996)
42		JSF (Windows, 1997)
41		Red Baron with Mission Builder (DOS, 1997)
41		Gunship! (Windows, 1999)
41		Red Baron with Mission Builder (Windows, 1997)
41		FlightGear (Windows, 1997)
41		688 Attack Sub (DOS, 1989)
41		Ultrawings (Windows, 2017)
40		RC Plane 3 (Windows, 2017)
40		Airplane Sky Voyage (Windows, 2018)
40		RC Fun City (Windows, 2018)
40		Blue Angels: Aerobatic Flight Simulator (Windows, 2017)
40		Super Huey II (DOS, 1988)
40		SFS PC 3.0: The Soaring Simulator (DOS, 1998)
40		Enemy Engaged 2: Desert Operations (Windows, 2008)
40		Jet de GO! (Windows, 2001)
40		Sub Command: Akula Seawolf 688(I) (Windows, 2001)
40		Search & Rescue: Coastal Heroes (Windows, 2002)
40		Search and Rescue 2 (Windows, 2000)
40		Hangsim (Windows, 2000)
40		F-16 Aggressor (Windows, 1999)
40		Fly! (Windows, 1999)
40		Fighter Ace 3.5 (Windows, 2002)
40		Submarine Commander (Windows, 2010)
40		Coast Guard (Windows, 2015)
40		Take On Helicopters (Windows, 2011)
40		The Good Life: The Tropical Paradise Simulation (Windows, 2012)
40		Enemy Engaged 2 (Windows, 2007)
40		DCS World (Windows, 2013)
40		Enigma: Rising Tide (Windows, 2003)
40		F/A-18 Operation Desert Storm (Windows, 2005)
40		High Roller (DOS, 1987)

Notes: Games similar to Merlin Challenge, Games like Merlin Challenge, Digital Integration Ltd., General Admission Software, DOS, Simulation, 1st-person, 3rd-person, Other, Flight, Aviation, Helicopter, Naval, Watercraft, PC, Game Similarities.