The perfect game, according to Nevrmore's argument, would be one that changes play style and mechanics consistently and in an original way every 30-40 minutes.

The first 10 minutes of the segment would be learning about the new moves and play type.

The next 10 minutes would be an intro mission.

The next 3 minutes would be a cut scene.

The next 7 minutes would be a challenge mission.

The last 10 minutes would be a boss fight. Or a flower planting. I mean, a game that wants to be over 10 hours is going to have to dig preeeetttty deep. So flower planting, or tree trimming, or head exploding, or melon carving. Lord knows you don't want a game that establishes parameters to play in and then play in them.