Fun Fact: It's estimated that the NES version of this game sold 2 million copies.
Top Gun was about as close to a flight sim as you were going to get on the NES. Players flew an F-14 Tomcat, the fighter aircraft that was featured in the Tom Cruise film, on missions to blow up enemy bases and ships and finally a space shuttle.
The toughest part of Top Gun was landing your fighter on an aircraft carrier at the end of each mission. To say the game was fussy about this is putting it lightly. The game didn't end if you crashed, you just lost a life, but if you could consistently nail those landings it was really satisfying.