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 every level
Beat the game
Skip a level
Get captured by an agent
Scare an archaeologist and then let him escape off of the level
Scare an archaeologist off of a cliff
View the credits
Make a boulder fall off of a level
Crush an archaeologist with a boulder
Scare an archaeologist while in the ground or a wall
Kill three or more archaeologists in under 1 second