Nanashi no Geemu (The Game with No Name) for the DS. It was Square Enix's foray into the horror genre, and not really known because it hasn't been translated. But it is AWESOME, in a "The Ring meets DS" kind of way. They got creepy atmosphere down pat, and the cursed game-within-the-game freaked me out way more than the actual ghosts coming after you. I loved the little touches, like the way the ghost of your dead friend would actually say your name (it's first-person, and you got to input your character's name and gender) before trying to kill you, and how you couldn't fight the ghosts; all you could do was run away or freeze and hope they didn't see you.