In my early pc gaming youth I put a tremendous amount of hours into naval sims during the late 80s and 90’s. Some of my faves were Strike Fleet, Hunt For Red October, and Destroyer Command.
Once the Silent Hunter series came to be I was hooked full stop on subs. Of the five SH games #3 is king and even better modded, 4/5 generations are almost as good but lack this or that in some manner. Any three are great by themselves.
Steam has a sale right now and SH III is only $2.49. I highly recommend you pick it up even if it’s for a super later date. It’s less than a coke at your local gas up.
Sneaking into a port in the dead of night and lighting it up with torpedoes like fireworks is pretty friggin sweet.