I don't know if this is one of those game security things, (like where GTA IV restricts you from completing some missions if you got the cracked version...) but I've noticed if I play offline:
-Your Perks stay at 0, and you cannot change perk in-game.
-Xbow scope is smaller. (It doesn't take up the screen; it's the size of Bullpup scope almost.)
-Cannot see Profile & Achievements.
If you're online again, everything goes back to normal, even if it happens when you're in the middle of the game.
Pretty weird huh?
-Your Perks stay at 0, and you cannot change perk in-game.
-Xbow scope is smaller. (It doesn't take up the screen; it's the size of Bullpup scope almost.)
-Cannot see Profile & Achievements.
If you're online again, everything goes back to normal, even if it happens when you're in the middle of the game.
Pretty weird huh?