Top Gun (NES)

Copyright
The Japanese version has one copyright screen, whereas the western versions have two. The PRG1 revision and European version added an extra copyright message.

Map Screen
The map screen is completely different in the western versions.

Finishing a Mission
In the Japanese version, on the score tally screen when you finish a mission, you are shown an image of your plane and on the plane's side is a star for each enemy destroyed. In the western versions, the score tally screen is just a black screen.

Take Off
The takeoff ramp is different between regions.

Credits
In the Japanese version, you get to see the credits after finishing the game.