Only near the end did I find out how to lift the wristwatch and only after beginning Last Light did I discover how to reload my weapons! Both are only mentioned once as a brief popup while you're fighting for your life - miss it and tough luck. Even if you see about the watch (and I never did) it doesn't work if you are showing the clipboard! So, even if you try the tool selector icon it doesn't work so you assume that's a future tool like say night vision goggles and forget about it. Talking of which, just before I exited to the swamp in Last Light, the character with me waved vaguely and muttered something like 'put that on'. I searched around for what the hell he was talking about. Eventually I found a kind of suit in an open closet. Clicked it. It's on. WTF it is I have no idea and never did find out. Made no visible difference to anything. I don't even know if I look cool in it because it's 1st person.
Anyway, after a huge effort I had to give up Last Light too because it was impossible to get past Red Square with the limited ammo and filters I had. I entered there with seconds of life left. After several reloads of the checkpoint I found a filter which gave me a minute - then another. Not sure it would matter though because I was helplessly outnumbered, brightly lit, and just kept repeatedly dying and restarting. Three or four sessions of that and I'd had enough. I checked on the net for a video walkthrough. The guy must have had a filters cheat or something because he never even looked at how many filters he had left. Plus a better weapon. He nonchalantly took his time picking off the assailant above one by one. None of them came down till later. With me, I shot one or two then was overrun every time. I laid down mines near the window they came out off but they must have just avoided them or were too strong for them to matter. Nothing I tried worked. I saw from the vid that an exit opens up later but it never did for me. It was no fun at all.
Overall there were some great battles though, and good stealth but often it was a matter of reloading checkpoint after checkpoint - learn by dying then act out a sequence that worked. That big momma for instance, all my ammo ran out in seconds. I resorted to stabbing it until my hand hurt. It seemed unkillable so I checked for a walkthrough. Again, the guy had infinite ammo, but at least I saw it could be killed and that was the only way forward. Back to the stabbing... my hand still hurts from two days ago.
Great game spoilt by lack of info and bad checkpoints where it can literally save as you are dying! I think Rockstar have got it right with their 'three-reloads-then-a-skip-option' which means you at least get your money's worth. I recall in Red Dead 2 having to rope a runaway bull. I had never once succeeded in roping even a friendly horse so I knew I wouldn't be able to rope this MF. I gave up and waited to die each time until the option came.
I certainly won't be paying full price for the 3rd game in the Metro series knowing the chances are I won't be able to enjoy the whole game. Not sure I'd even pay a tenner for it now.
I'm now downloading more content for Fallout 4 - at least I'm certain you can't fail that game because there's so much freedom to regroup and try again under better circumstances (plus true gamesaves!) On and off, I had TWO YEARS' WORTH of enjoyment with Fallout 4 which is brilliant value. And now I get to play it even more!