Infocom published an adventure game based on the tabletop RPG around the time they went under in the late 1980’s. The game was developed by Westwood Associates.
ETA: And I believe FASA was still around and owned the rights to the universe at that point.
MegaMek is a surprising amount of fun if you were into the old pencil/paper/miniatures game, since it’s basically a digital adaptation.
Still, for my money, nothing beats the old-school ones like “MechWarrior” and “Crescent Hawk’s Revenge”.
That sneaking tension is why I loved the subs. Patience and strategy were key. All of the games I remember had time acceleration features, or you could always dive below the thermocline and sprint towards a waypoint. Great fun, for me.
As for the planes, I NEVER successfully land either an F-15 or F-16 
I remember playing Crescent Hawk’s Revenge and being unable to find an enemy Mech. I set the forest on fire and suddenly no more hiding places.
Along with starting gunfight/bar-fight in Sentinel Worlds that is one of my favorite early gaming moments.
Not to hijack, but sub games have two kinds of tension that I liked- the sneaking tension of trying to sneak up on a convoy and torpedo some merchant ships, and the post-attack evasion from the escorts and their depth charges.
I used to play the crap out of Aces of the Deep, and the tedium was part of the game… it made you *more *tense than less; even on compressed time, you still spent a lot of real-world time going between your base and your patrol sector, and I knew something would happen, but not what or when.
Crescent Hawks inception was awesome although I could never finish because of the stupid map room.
I always wanted to try virtual world but never got down to Pasadena… what were the controls like ?