Hi Shifters,
We are happy to tell you that we finally found and fixed the bug related to "The Collector" achievement. You can now simply get it by entering a level and leaving it.
Sorry again for the waiting.
[img]https://steamcdn-a.akamaihd.net/steamcommunity/public/images/clans/30519649/3e26aafaffcdf457ee04c283993df3ddf9877868.png[/img]
Thank you!
-VirginRedemption