Here is the full list of all 44 Outpost achievements.
The base game contains 39 achievements, and there is 1 DLC pack containing 5 achievements.
Have all golden tools
Have a sapphire tool
Reach night 50
Activate 12 runestones
Have a golden tool
Earn 10,000 experience in total
Encounter 20 different creatures
Have all silver tools
Have all steel tools
Have all stone tools
Catch 3 wisps
Have a silver tool
Have 50 talents
Have talents for every season
Have 25 talents
Earn 1,000 experience in total
Reach night 25
Open 4 chests
Start the night with >0 energy
Have a steel tool
Earn 100 experience in total
Encounter 10 different creatures
Have 5 talents
Reach night 10
Encounter 5 different creatures
Earn 10 experience in total
Have a stone tool
Reach night 2
Activate a runestone
Open 44 chests
Open 444 chests
Catch 33 wisps
Catch 333 wisps
Disable the help messages
Activate 123 runestones
Activate 1234 runestones
Have 100 talents
Have all sapphire tools
Earn 1,000,000 experience in total
Have 150 talents
Have a void tool
Have all void tools
Earn 10,000,000 experience in total
Earn 100,000,000 experience in total