Far Cry 3 is probably the shortest so AC3 and Infinite will have more content/last longer.
I'd have to disagree. I'd say Infinite is the shortest. Though it is my favorite of the 3 of those.
Also, I personally thought AC3 was one of the worst AC games. Far Cry 3 from what I remember was fairly long, especially with all the collectibles and such. There's also blood dragon, which is a standalone game, but it's based on FC3.
Overall I'd say, in this order:
FC3 BI AC3 --- GT: Menace 117 PSN: Menace117 I would've liked to run tests on those seashells. - Mordin Solus