for me farcry was about a good 80 minutes. after which i had to check the box to make sure i had the right game. i can't recall if its the first time i had the gaming experience of "are you serious" but it certainly is the most memorable case of it. at least i only wasted 8 dollars on it.
The only Farcry I know of is this game, and there's no way you went through it in 80 minutes unless you're talking about the demo. There were individual missions in that game that took 30-40 minutes to go through, and there are 20 missions in the game.