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