I play 3 occasionally. Never finished a game as its SO LONG. Usually around 1942 I get tired of it and quit. Then when I come back I start a new one as my skills are rusty and Ill get wasted by mid-war destroyers.
I prefer Wolves of the Pacific, using all the late war torpedos. The unpatched version is bugged and the 88mm deck has a range of over 8 miles just figure out its range XD.
The Walter boat in 4 is a rocketship equip it with seeking torps dive to 200 meters cruise at 19 knots then get in the middle of the American formation persicope depth and let the tonnage whoring beggin. So funny watching dessies trying to catch you while you are under water