Missed one collectible for voxophone and sightseer each

[B4d4ssHunt4r]

So, I'm pretty sure I collected all collectibles for the whole game but each collectible just shows one short. Is there any way I can keep track of what I missed or is it some kind of a bug? What should I do?

[Evertonian]

you can see which voxophones you have by looking at the list in game from your very last savegame 

 

you can then just compare the list to the guides showing the whole lot in order  (there are lists rather than having to watch the videos)

 

As for the sightseer you will have to play thru again following a guide and make sure you get each one in turn as I don't think the game tells you which ones you have

 

As soon as you get to the missing one the trophy will pop

 

If you haven't done your 1999 playthru then you can just pick up both of these by following the guides on that run

[B4d4ssHunt4r]

Thanks mate but what does 1999 mode have to do with the collectibles though?

[Evertonian]

the collectibles (bar the health shield salt potions) carry thru from one playthru till the next

 

so if you have only played it on a lower degree of difficulty then as you have to play it again on 1999 mode, you can just mop up the missing two on that playthru