I'm playing in coop. First thing I'd like to ask is whether the Live to Fight Another Day upgrade gives sunglasses every level as in every mission, or every level as in through experience gain?

If it is the former (mission) then it seems pointless as the number of sunglasses seems to always reset to 3 at each new mission, it doesn't stack from mission to mission. Is this a bug or is this intended or are we doing something wrong?

If it is the latter (experience gain) then it seems not to work at all as we got no new sunglasses at each level.

Thanks for your help!