Here is the full list of all 29 The Wild at Heart achievements.
Defeat The Never.
Find all the Lost Journal Pages missing from "Book".
Open the way to Umbral Lethea, using the power of the Greenshield Artifacts.
Purchase every Gustbuster upgrade.
Purchase every Warden's Way upgrade.
Complete every beastie bounty from Toothpicks.
Take a moment of thoughtful meditation by the waterfall in Heartlands.
Kick an item directly into the Stash Box.
Safely return all of Litterbox's cats to the Grove.
Purchase all health upgrades.
Learn about every area of the Deep Woods from Toothpicks.
Completely fill out the Grove Trove, finding every last missing treasure.
Listen to all the juicy gossip that the Twins have to dish.
Purchase every Bag Slot upgrade.
Purchase every Spriteling Cap upgrade.
Fully reveal the maps for every known area of the Deep Woods.
Break a crystal with Barblings without throwing them.
Befriend the 5 main Spriteling types.
Craft every type of Tonic.
Craft every type of Meal.
Stay up through the night until daybreak, outside of The Grove.
Hear all of Scrap Heap's tips and tricks.
Get 5 or more Spritelings frozen in ice simultaneously.
Make a trade with Rubbish.
Recall all wayward Greenshields to The Grove, uncovering the details of their missions.
Craft your first item.
Build your first camp.
Reach The Grove, the home of the Greenshields.
Successfully run away from home.