Yo, so I decided to complete the Campaign weekly for this, well, week. Reclamation; Complete Reclaimer on Legendary difficulty with the Mythic, Tilt, Tough Luck and Thunderstorm skulls. And A Hard Rain; Complete any Campaign Mission on Heroic or higher difficulty with Mythic , Tilt and Thunderstorm skulls.
So that would accumulate 40,000 XP, assuming that they both added together if you just did Reclamation. So I decided to open up the lobby, set the right skulls, difficulty, mission and off I went. It was a frustrating hour or two but I did it, I got an achievement that told me that I had completed a mission with three skulls or more with heroic difficulty or higher so I thought “Great! I’ve done it!”. Wrong. I back out of the next mission that followed only to see that the challenges were uncompleted. Unlike Halo Reach the challenges don’t set themselves up for you so I have done something wrong? Or is this a bug I’m not aware of.
Thanks, Panda.