[quote name='help1']The challenges are achievement-esque, but with such a short SP, having all the achievements be SP is sort of dumb.[/QUOTE]
Agreed.
Making the challenges give players achievements would've been so easy.
Something like complete Prestige mode x amount of times.
Complete all Killer, Operations, etc challenges.
Complete all AR, SMG, LMG, Sniper, Shotgun challenges. Any of those could've been made into achievements.