Here is the full list of all 34 SteamWorld Dig 2 achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Complete 5 caves.
Enter Yarrow and discover a strangely verdant area.
Defeat the first boss.
Discover the last refuge of a fallen civilization, The Oasis.
Defeat the Great Prophet.
Escape the grasp of Vectron.
Leave the Earth with your companion in tow.
Finish the game with a gold star in the Time category. How fast is that, exactly? It’s up to you to find out!
Finish the game with a gold star in the Deaths category. You can’t even die once, buddy!
Finish the game with a gold star in the Wealth category. Get filthy rich!
Finish the game with a gold star in the Secrets category.
Finish the game with a gold star in every category.
Sell $10,000 worth of resources.
Sell $2,500 worth of resources.
Collect 10 artifacts.
Collect 25 artifacts.
Collect 42 artifacts.
Find all missing Yonker brothers.
Upgrade your lamp to the highest level possible.
Do not trigger the alarm in Vectron more than twice.
Kill two enemies with one crushing rock.
Kill an enemy with its own projectile.
Travel a distance of 100 tiles horizontally without touching the controls.
Collect 10 Silver ore resources.
Upgrade your pickaxe to the highest level possible.
Upgrade your backpack to the highest level possible.
Upgrade your armor to the highest level possible.
Reach experience level 14.
Collect 15 resources with your Hook Shot.
Complete 20 challenge caves.
Buy all upgrades available at the workbench.
Hit 15 flyers with your Hook Shot.
Destroy all devices without entering Vectron.
Survive the Ultimate Trial.