I was tempted to say Wolfenstein 3D, but there was a game in the early-mid 80s that I believe was simply called "Jet Fighter". Strictly 4-color wire frame; the most memorable thing about it was the constant incoming missile alarm.

Of course, Wizardry also had a 3D element, monochrome wire frame dungeon walls. Good stuff. I was recently digging through an old box in the garage and found my original retail box for Wizardry. That was a cool friggin' box. Yes, I am teh Old Skool Gamorzz. (I've never written anything like that before. I feel cheapened.)