Weapon+Melee in "one" playthrough?
Okay I just picked up this game and wanna get the full 970.
So there is one achievement that says use all weapons, another that says use only melee. It's clear that you can't do both at the same time when playing this game. However, I'd like to know if I could do it by repeating every chapter just when I finished it and then moving on. Like the first time I use all the guns I find, then when it's finished I redo the level, use melee only. And only then move on to the next chapter. This just fits my usual playing style, and it'll be easier to remember where the enemies are when I just played through the level once anyway.
The reason I'm asking this is because I read in another thread that for the birds and metals, the completion status of the levels is overwritten each time you replay them, so you need to make sure that you don't replay a level and not get birds/metals there if you want to get the 100% birds/metals achievements. And I'm wondering if the same would happen with melee/weapons or if that is counted outside of those level statistics, so that the game can save at the same time that I both finished the first level with shooting the gun and that I finished it with melee only.
PS: Is there any detailed list on where to find all the firearms and melee weapons in the game, like which are on which level?