Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock	Points
Ascending and Descending	Completed floor three puzzles.	50
Belvedere	Completed floor five puzzles.	50
Castrovalva	Teleported for the first time.	50
Check Out Any Time You Like	Completed both endings.	150
Colitas	Entered the first 4-digit code.	50
Devil's Tuning Fork	Found the phone.	50
Gravitation	Completed floor four puzzles.	50
Heaven or Hell	Read the manager's notebook in the observation room.	50
Mercedes	Entered the third 4-digit code.	50
Prisoners of Our Own Device	Completed the game.	200
Relativity	Completed floor two puzzles.	50
Steely Knives	Entered the fourth 4-digit code.	50
Tiffany	Entered the second 4-digit code.	50
Voices Down the Corridor	Entered the fifth 4-digit code.	50
Waterfall	Completed floor one puzzles.	50