Here is the full list of all 18 Sheltered achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Trap 100 animals on the shelter surface (cumulatively)
Survive 100 days
Fully upgrade all systems
Travel 1000 miles (cumulatively) on the map
Take the RV out on an expedition
Fully upgrade a system
Grow and harvest a plant from the plant station
Have 5 or more plant stations in the shelter
Travel 500 miles (cumulatively) on the map
Collect all 10 tools (on a single game)
Win combat using a gun
Search 200 locations (cumulatively)
Travel 100 miles (cumulatively) on the map
Upgrade a system once
Survive a week
Trap an animal on the shelter surface
Subdue an enemy in combat
Craft your first object/item