Read all the notes found in the game.

Kill all enemies in the game.

Activate the bomb.

Complete the game.

Find a secret room.

Open all locked doors.

Complete the game without dying once.

Find all hidden items.

Solve all puzzles.

Unlock all achievements in the game.

Examine a specific status.

Find a secret place.

Carefully examine an unusual object.

Find a hidden key.

Start the elevator for the first time.

Restore power.

Open a specific hidden door.

Find a rare key.

Go to the island.

Open the safe in the main office.

Activate the old video projector.