99		Das Boot: German U-Boat Simulation (DOS, 1990)
99		Up Periscope! (DOS, 1988)
99		Silent Service (DOS, 1985)
92		Sub Battle Simulator (DOS, 1987)
90		USS Stinger (DOS, 1989)
83		Aces of the Deep (DOS, 1994)
80		Jutland (DOS, 1993)
72		Destroyer (DOS, 1987)
72		PT-109 (DOS, 1987)
71		Steel Fury: Kharkov 1942 (Windows, 2008)
70		1914: Shells of Fury (Windows, 2007)
70		Advanced Destroyer Simulator (DOS, 1990)
70		Tanks' Destroyer (DOS, 1993)
61		Silent Hunter (DOS, 1996)
60		Submarine Commander (Windows, 2010)
60		Sub Command: Akula Seawolf 688(I) (Windows, 2001)
60		Silent Hunter II (Windows, 2001)
50		Napoleon 1813 (Windows, 1999)
50		Batfish (DOS, 1991)
50		Steel Armor: Blaze of War (Windows, 2011)
42		688 Attack Sub (DOS, 1989)
41		Pacific Strike (DOS, 1994)
40		Fighter Squadron: The Screamin' Demons over Europe (Windows, 1999)
40		Tom Clancy's SSN (Windows, 1996)
40		WWII Battle Tanks: T-34 vs. Tiger (Windows, 2007)
40		Wings of Destiny (Windows, 2000)
40		Sands of Fire (DOS, 1990)
40		Nations: WWII Fighter Command (Windows, 1999)
40		Destroyer Command (Windows, 2002)
40		Enigma: Rising Tide (Windows, 2003)

Notes: Games similar to GATO, Games like GATO, Spectrum Holobyte, Inc., DOS, Simulation, Historical Events, World War II, Real-Time, 1st-person, Naval, Watercraft, World War II, Aquatic, Underwater, Submarine, PC, Game Similarities.