I've played both Harpoons as well as Seawolf, a "lite" modern sub sim, and Aces of the Deep. AoD was great, kinda like EAW for subs.

Seawolf had that awesome multiplay. Of course, H2H was kinda boring because at slow speeds you had to be on top of each other to hear. Usually someone would get impatient and active ping, then it was a race to see whose rocket-launched torpedo killed the other guy first.

I remember well coordinating destroyers, dunking helos, and P-3's looking for Han subs in Harpoon.

The Jedi Master