The Wild at Heart

This guide applies to completing the Grove Trove, Lost Cats, and Treasure Chests, and will in total cost you 3007 Scrap. If you don't have enough once you've beat the game, sell bloom stones and elden tears for quick money. These achievements are easiest once you've beaten the game and reloaded, for reasons explained by the story. That being said, you can work towards it at any time.

Step 1:
Once you've completed Cath's mission: You may wait a day and buy a compass from her for 7 scrap.
Step 2:
If you haven't beaten the game but have gotten all three artifacts, you will need to beat the story. If you try to do the next step, you will see why.
Step 3:
Give the compass to someone who can solve it, then wait a day.
They are: .
You are then able to buy maps for the locations of all three collectible types, for 1000 Scrap each.

Once you have these, you are able to track down everything you need. If you'd like to do this without buying the maps, I recommend Innocent's spoiler-free on Steam, available here.