Flight of the Intruder, released in 1991, is one of the classic combat flight sims of all time! It was developed by two teams, one in the USA and one in the UK. Flyable aircraft were the A-6 Intruder, F-4 Phantom, MiG-21 - this was the first time I got to fly a MiG-21! I remember flying head-to-head against my brother - he in the F-4 Phantom and myself in the MiG-21. Somehow he could always tell which aircraft was piloted by me despite my best efforts to send in the drones first! Until Falcon 3.0 was released, Flight of the Intruder led the pack in features. I remember getting FOTI for the Atari ST, sometime after I came across Falcon, and being amazed at the depth of the simulation, especially the mission planning options.