Is there any way to save a game after the Primary Objective has been reached?

You can save a level in the game, with a special program you have to download. You can download it at http://www.sh2fleet.com/subsim_files/patches.html

Good luck.

We all know that when we hit the ‘Esc’ key, we get all the facts & figures of the current mission. If it says, “mission survived”, (I think it’s top left) the mission will end, if the ‘Esc’ key is pressed again, without saving! Frustrating if you want to complete all goals. If on the other hand the info page states “Enemy is nearby” the game will be saved. So if you need to stop playing the game, make sure you have this “Enemy close” or “Enemy is nearby” statement on the mission info page. You don’t need to be surrounded by Destroyers! A small enemy aircraft will do the trick.