The most atmospheric games you've played

[okr]

Console:
The Legend of Zelda: Wind Waker
Metroid Prime
Xenoblade Chronicles
Red Dead Redemption
Valkyria Chronicles
Flower
Journey

PC:
Outcast
System Shock
Wing Commander: Privateer
Blade Runner
Betrayal at Krondor
Planescape Torment
Dungeon Keeper
Syndicate