Alternate Character Interpretation: Either Trip is a scared young girl with understandable motivations, who's sympathetic despite her actions, or a calculating bitch who will exploit anyone and anything to get what she wants. Any forum thread concerning Enslaved will have a fair number of people defending either interpretation.
Guide Dang It!: Finding every Tech Orb in the game (there's an achievement/trophy for it). While you likely wont have trouble finding the vast majority of them (say 70 to 80% per level), finding ALL of them will require careful use of a guide. Even worse is the fact that some orbs are glitchy, and sometimes will either randomly not be there, or will disappear if you don't grab it fast enough.
Finding every Mask as well.
It's Easy, So It Sucks: A common complaint by reviewers. Game Informer cited how the game apparently won't let you jump unless you'll land safely.
Jerkass Woobie: Trip makes some awful decisions over the course of the game, but you can't help but feel bad for her.