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