Here is the full list of all 11 The Dweller achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
Beat the game
Beat every level
Get captured by an agent
View the credits
Scare an archaeologist and then let him escape off of the level
Crush an archaeologist with a boulder
Make a boulder fall off of a level
Scare an archaeologist off of a cliff
Scare an archaeologist while in the ground or a wall
Skip a level
Kill three or more archaeologists in under 1 second