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