99		Sub Battle Simulator (DOS, 1987)
85		Destroyer (DOS, 1987)
84		Up Periscope! (DOS, 1988)
72		GATO (DOS, 1984)
61		Batfish (DOS, 1991)
60		1914: Shells of Fury (Windows, 2007)
53		Aces of the Deep (DOS, 1994)
52		Sands of Fire (DOS, 1990)
51		Silent Hunter (DOS, 1996)
51		Pacific Strike (DOS, 1994)
50		Jutland (DOS, 1993)
50		Nations: WWII Fighter Command (Windows, 1999)
50		Wings of Destiny (Windows, 2000)
50		Destroyer Command (Windows, 2002)
50		Silent Hunter II (Windows, 2001)
50		Fighter Squadron: The Screamin' Demons over Europe (Windows, 1999)
43		Silent Service (DOS, 1985)
42		Das Boot: German U-Boat Simulation (DOS, 1990)
42		Advanced Destroyer Simulator (DOS, 1990)
41		Steel Fury: Kharkov 1942 (Windows, 2008)
40		Tanks' Destroyer (DOS, 1993)

Notes: Games similar to PT-109, Games like PT-109, Digital Illusions, Inc., Spectrum Holobyte, Inc., DOS, Simulation, Historical Events, World War II, 1st-person, Naval, Watercraft, World War II, PC, Game Similarities.