Well...I went through every single location and I picked up every one of them according to the guide. There was one that never would register, so I went back after completing the game because I knew exactly where it was. I loaded up a save and went straight there...picked up the ammo, health that this particular Lambda was marking...and it still won't register. I have 44/45 now...I know exactly which one it is...I got there...and it still won't unlock!!! Please help!!!