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