Originally Posted by Metaphorically
Fast questions, the flags inside the six Lairs, do I have the collect them while I'm inside or can I come back later and collect them?
Yup missed a few myself ... as you take a quick gander around as you leave some area and look up and go 'ah crap' as you see some glowing thing well out of reach. Those lairs are good an all but really makes me feel like I'm playing Tomb Raider without the tanned ass and her falling to her death every 30 seconds. But in saying that I want to stretch this game out so missing a few just gives me a good excuse to keep playing.
But I'm confident that you can go back and collect them all. It would be far too cruel if you couldn't.