Janes 688i Hunter/Killer nuclear submarine simulation is the most sophisticated and detailed 688 class simulation out today. It has lot of potential to be very nice multiplayer game title, but it has one drawback... it takes shitload of time to play one great mission (but is it really a drawback?:).

Here you can find few of the Janes 688 missions that PMC has created.

Download PMC made missions - PMC_688.zip

Also grab the upgrade from Janes pages: www.janes.ea.com.