Here is the full list of all 36 Crashlands achievements.
Get to Tundra hardcore mode
Get to Bawg in hardcore mode
Beat the first boss in hardcore mode
Craft 500 walls.
Craft 1,000 floors.
Craft 10,000 floors.
Create 15 taxidermied creatures.
Defeat 100 Epic Creatures.
Finally Defeat Hewgodooko.
Defeat 100 Powerful Creatures.
Defeat IHO.
Defeat the Poteti.
Defeat EMG.
Wear a full set of excellent (or better).
Defeat Toomah.
Craft 5 legendary items.
Set foot in the Tundra.
Defeat Hewgodooko in the Bawg.
Defeat 1000 Creatures.
Defeat the Ynnix.
Defeat Jessica.
Craft 100 walls.
Set foot in the Bawg.
Defeat Hewgodooko in the Savannah.
Defeat Baary.
Defeat Blockstock.
Craft 100 floors.
Defeat the Baconweed Fairy.
Craft a legendary item.
Defeat 100 creatures.
Build THE GONG.
Beat the game in Challenge Mode
Beat the game on Insane Mode
Beat the hardcore mode
Beat the hardcore mode in challenge difficulty
Beat the hardcore mode in insane difficulty