[Torplexed]

SH2 and SH3 shared the same subject matter: The German U-Boat campaign in the Atlantic. If the subject of SH4 is the American (or Allied) submarine campaign in the Pacific there are some who won't be interested in picking it up because they feel historically the Pacific campaign wasn't as much of a challenge for a virtual submarine captain as it's Atlantic counterpart. On the other hand there will be those who would never touch a U-Boat simulator who will be more than happy to play skipper of a USN boat.

And then there those who won't switch because they feel Allied subs just aren't as sleek and cool as the German ones. It all comes down to taste I guess.