"Junkyard King" Achievement [SPOILERS]

[DALCOhstangultion]

When I finally winnowed down my unfinished Achievements enough to get a handle on them, I found I had missed one ("Junkyard King") way back in the first game ("Deponia"). It's one of those collecting quests that span the game (similar to the platypus egg collection quests in the other games). Unfortunately, with this quest, we're collecting junk items that are indistinguishable from all the rest of the junk on the junk planet (with no mouse-over changes, as usual). So, it's impossible to do without actually looking at a guide with screenshots. The guide I'm using is:

https://steamcommunity.com/sharedfiles/filedetails/?id=283443203&searchtext=journey+completed

which, unfortunately, is in Russian. But, all we really need are the screenshots, anyway. The problem I'm having is that I don't know for sure if this has to be done in one linear game stream. I'm pretty sure it does since I pulled up various saves and, I think, grabbed all the junk. I got no Achievement, so I guess I'm going to have to make another run through of that game just to get the Achievment. But, does anyone know for sure that all the pieces have to be collected in one game stream? Are there any other restrictions?

EDIT: On the assumption that I didn't miss anything when I tried to get this Achievement by loading disparate saves and collecting the items, I'll say that it has to be done so that all the items are collected in the same thread of saves. Doing it that way gave me the Achievement. Also, loading a save doesn't seem to invalidate the work (as long as you continue with collecting the items at the place you stopped in the save you just loaded).

[KidCalvotheKid]

so I just collected all pieces in one linear play, heard the claps and unlocked the sculpture but didnt get the achivment. Do you have any idea why?