Here is the full list of all 39 Arid achievements.
Complete the game on Tourist or harder difficulties.
Complete the game on Explorer or harder difficulties.
Complete the game on Survivalist or harder difficulties.
Complete the game on Dead Man Walking.
A sane mad man in a world of sane madness.
You escaped the atacama desert alive!
Read all 36 letters, notes and journals.
Survive 50 days in the game (any difficulty).
You discovered the secret of the waterfall.
Found an old acquaintance.
Find where the kid has gone.
Repair all 84 facilities (including story related).
Craft a herbs poultice.
Obtained the Flare Gun.
Find the Bath Tub.
Run away from the bees! Maybe it's safer at night..
Got access to the Saltpeter Plant.
Find out the fate of the couple of lovers.
Reach the Moon Valley.
Opened the way in the Canyon.
Find the unfinished art.
Find the curious mural.
Survive 10 days in the game (any difficulty).
Discover what happened to the miners.
Find the Pool.
Read 10 letters, notes or journals.
Reach the Mining Town.
Fix the bridge to get access to the refuge.
Something lurks in the darkness...
Repair 10 facilities.
You unlocked access to the mines.
Encounter a sandstorm.
Hopefully the last one.
Open your first shortcut.
Survive 1 day in the game (any difficulty)
Find a Dead Viscacha
Move on from the crashsite.
Find or craft an high quality tool.
Wake up in the Atacama desert.