Nearly there Achievement
Find 120 collectibles.
There are actually a total of 140 collectibles in the game (hence you're "Nearly there"), though this is the max you'll need achievement-wise. Anything labeled as a Fact, ID Card, Recording, etc. will count toward this. Weapon mods and blueprints do as well. Click here for a collectible guide.
One small trick to this though: collectibles are counted multiple times for each save file. You could technically pick up the first one in 120 different games if you wanted. So you don't need to worry about this one really.