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