Here is the full list of all 26 Conarium achievements.
Die in five different ways.
Experience the second ending.
Solve the puzzle on the cellar door without any clues.
Examine all objects in the game.
Finish the game with 100% progress.
Finish the game without dying.
Experience the first ending.
Get all trophy items in the game.
Get all notebook drawings in the game.
Reach the final level.
Reach the ruins under Rub'al Khali.
Get all secrets in the game.
Find all documents in the game.
Check all the wooden masks in the mansion.
Examine all the notes and diagrams in the game.
Reach the Mansion for the second time.
Don't get caught by the mummies in the Connection halls.
Use the walkietalkie voluntarily, in every location that it is available.
Reach the Connection halls.
Solve the symbol drawing puzzle at the first try.
Check all the books in the base and the mansion.
Get on the submarine.
Manage to run the Link Elevator.
Solve the radio room puzzle.
Provide electricity to the base.
Walk out of opposite sides of the map outside the base.