Square Enix have released a horror game called Nanashi no Appi, which was previously a DS horror title. The sequel is available on the iphone, ipod touch and priced at ¥800.
You play as a person who’s downloaded a cursed 2D RPG, that promises your death within seven days unless you can dispose of it. The sequel adds 3D sound, Twitter functionality and a new system which shows a virtual OS slowly getting eaten away as the curse progresses and takes hold. An Android version will be released in February.