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.
Buy all upgrades available at the workbench.
Upgrade your backpack to the highest level possible.
Travel a distance of 100 tiles horizontally without touching the controls.
Sell $10,000 worth of resources.
Upgrade your lamp to the highest level possible.
Leave the Earth with your companion in tow.
Upgrade your pickaxe to the highest level possible.
Reach experience level 14.
Upgrade your armor to the highest level possible.
Collect 25 artifacts.
Complete 20 challenge caves.
Escape the grasp of Vectron.
Kill two enemies with one crushing rock.
Defeat the Great Prophet.
Sell $2,500 worth of resources.
Collect 10 Silver ore resources.
Kill an enemy with its own projectile.
Hit 15 flyers with your Hook Shot.
Collect 10 artifacts.
Discover the last refuge of a fallen civilization, The Oasis.
Enter Yarrow and discover a strangely verdant area.
Complete 5 caves.
Defeat the first boss.
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.
Collect 42 artifacts.
Find all missing Yonker brothers.
Do not trigger the alarm in Vectron more than twice.
Collect 15 resources with your Hook Shot.
Destroy all devices without entering Vectron.
Survive the Ultimate Trial.