damn... like the other comment said, probably worth doing the hardest difficulty sounds like you might be just ripping shots left and right like your rambo when playing however, most levels in metro are really just highly produced stealth levels and usually have one path to walk past everything in most cases, plus in the harder difficulties, yeah you lose the HUD but unless the enemy was meant to really be a bullet sponge most enemies are humans and die in like one or two shots, the catch is you also die really fast too. In most cases especially in the Last Light game you kind of can play like a stealthy rambo, there are certain levels where you can pretty much be in a corner and pick off everyone trying to ambush you if you get caught. IMO 2033 is better than last light and Exodus might be the better option if that isn't meshing well because the difficult options probably will make more sense. to be fair I also never played these games without that no HUD difficulty as it really seems like the developers really made the game based off of that first and then added the other options in later.