Falcon AT was a tremendous leap beyond the original Falcon, , providing 16 Color EGA graphics. In most senses it was Falcon 2.0 (explaining the otherwise inexplicable gap between Falcon and Falcon 3.0), although there was a Falcon 2.0 marketed for Macs using a box that looked like the original Falcon box. Falcon AT had a blue and white box.
For me it was a groundbreaking sim, the first really realistic sim that I could really get into in that it provided the realism of Falcon with better technology.
MiGMan thanks Dave for this info.
Versions of the classic F-16 combat flight sim "Falcon":
F-16 Fighting Falcon - 1985
Falcon 2.2 - the Mac version
Falcon 4 Allied Force