One word: no. Or maybe if the 80 hours is optional, because then I can choose wether I do all the sidequests and extra levels or not. OR it has to be so original, so epic and so good that I will play it for that many hours, but then it has to be of the same quality of Zelda or Okami or something like that. Otherwise (just a game with a boring battle system and RTP graphics), no, I wouldn't play 80 hours long.