Originally Posted by Mr Matty
Seeing red doesnt unlock on level 1 i tried it in co op and normal the summoning is the easiest level to get that on just blow all the pillars down and search its such a small area to scout.
Plus you have put the wrong video in the slot of the Overachiever
you described it as the 7 pots but it shows the spiders spike trap.
It might have glitched on your or something, seems it's possibly switching to cooperative and doing collectibles and also getting some in single player is making the game not unlock the achievements.
Thanks for pointing out the wrong video, I didn't mean to paste the wrong link in there. It's fixed now.