Sega Master System / Mark III / Game Gear
Joe Montana Football
Sega Master System
The PC version of this epic American football simulator was visually stunning. Obviously the Master System can't quite cope with VGA graphics, but it certainly has a good go. A quick look at the screenshots here will show that this looks more than respectable.
One of the biggest problems with the PC version of this game was that it was really difficult to play. This has been more than rectified here. The Master System version of Joe Montana plays like a dream in comparison to it's predecessor!
If you're after the definitive American football simulator for your Master System, then get ready as this is the game for you.