StarFox 64 has multiple paths. You'd have to play it at least 3 times to play every stage. Also, if you get a good enough score on a stage, you get a medal. You can also unlock a harder dificulty (by getting all the medals? I forget). Then you can try and get medals again on every stage. Assuming you were good enough to get all medals on all stages each time you play through the game, it'd take 6 playthroughs, 6 hours to do everything. :B Depends on how much of a completist you are.