Major Istar - Under the Doomed Sea is a graphical adventure game, and a fairly difficult one. Unlike some of the other graphic adventure games done around this time (notably the Mark Data ones), it was not animated... during the adventure portions. However, it was fairly unique in that it offered several arcade sequences during the playing of the game as well (the only other one from around this time period that I remember that also did this was Spectral Associates Syzygy). The game is set in an underwater dome during the 21st century.
Title: Major Istar - Under the Doomed Sea
Author: B.J. Chambless
Publisher: Computerware
Released: 1984
Requires: Color Computer 1,2,3, 32K RAM, tape or disk.