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