I just played all the way back through the game b/c the achievement didn't unlock, and when I got to level 10 there were ZERO collectibles anywhere to be had. It's like they glitched and completely disappeared from the game. I'm wondering if this might be what causes the glitch at least sometimes because they game can no longer even track if I've gotten them or not, since they no longer exist.
Fuck I don't want to do this POS a 3rd time for 100%.
Landed on exactly 500,000/500,000gs with exactly 18500 achievements and exactly 500 games. All 100% including DLC. Was going hard the first half of January to reach that goal! Finished it on 1-19-2016. Final achievement: Completion Serenity in Nero.