Here is the full list of all 36 Crashlands achievements.
Finally Defeat Hewgodooko.
Craft 500 walls.
Craft 5 legendary items.
Defeat IHO.
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 100 Powerful Creatures.
Defeat the Ynnix.
Defeat Jessica.
Set foot in the Bawg.
Defeat Hewgodooko in the Savannah.
Defeat Blockstock.
Defeat the Baconweed Fairy.
Create 15 taxidermied creatures.
Craft 1,000 floors.
Defeat 1000 Creatures.
Craft 100 walls.
Defeat Baary.
Craft a legendary item.
Craft 100 floors.
Defeat 100 creatures.
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