15 Sadistic Xbox One Achievements Only Hardcore Gamers Unlocked

11. Personal Decorator - Call Of Duty: Black Ops III

Not since the Mile High Club, or the ridiculously over complicated zombie achievements has there been a bigger challenge to grace Call of Duty. This achievement requires you to earn all decorations in the Black Ops III campaign. Sounds easy enough right? You couldn't be more wrong.

While there's some semi-challenging tasks like completing the campaign on Veteran and killing 2000 enemies, they seem like child's play compared to others such as completing the game on the realistic difficulty, where you die from one shot, no matter what. And those of us who know the ever-existent bloody screen of Call of Duty, know getting shot is nothing but a certainty. But that's not even the real challenge, because co-op makes it a whole lot easier.

The real challenge comes from the combat immersion, which is solo only, and you must complete it on the realistic difficulty. That means no co-op partner to bail you out of trouble. And let's not forget there's a decoration for unlocking all weapons, attachments and camos which will require a minimum of 17,000 kills. The grind is real, and the grind will make even the most diehard Call of Duty fans pass on this one.