DOS

688 Attack Sub

Title screen

Mission selection screen

U.S. control room

Soviet control room

U.S. torpedo room

Overhead map and U.S. sonar controls

Contour map and U.S. navigation control

U.S. damage screen

U.S. periscope view of a torpedoed ship

Not every mission is successful :)

Preview release from Maxell. You can see the date is 1988.

The preview release was much smaller and left out some functionality.