Solve the puzzle on the cellar door without any clues.
Walk out of opposite sides of the map outside the base.
Don't get caught by the mummies in the Connection Halls.
Experience the second ending.
Experience the first ending.
Get all notebook drawings in the game.
Get all collectables in the game.
Reach the final level.
Reach the ruins under Rub' al Khali.
Get all secrets in the game.
Check all the wooden masks in the Mansion.
Reach the Mansion for the second time.
Reach the Connection Halls.
Solve the symbol-drawing puzzle on 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.
Use the walkie-talkie voluntarily in every location that it is available.
Finish the game without dying.
Die in five different ways.
Finish the game with 100% progress.
Examine all the notes and diagrams in the game.
Find all documents in the game.
Examine all objects in the game.
