Admittedly I've not checked YouTube or anything yet but I was wondering if anyone knew how to solve the rotating columns puzzle in the 8th Predator mission?
I think you have to align the glowing predator symbol(that show up in thermal vision) of the blocks with the hand sign. If not then just trial and error until you get right combination.
About 2 minutes in. It's to do with some symbols that show up in infra-red.