I did and found some names for a few nations, the USA had an unnamed Prototype.

Now either the USA sucks and are behind, and scared to admit we do not have one, or we got one so epic we refuse to tell anyone about it.:)

What I found in common is that they are all more underwater missiles than true torpedoes, or what we subsimmers are used to launching from our virtual boats.

Das Boot type warfare may be far and gone.