FATAL FRAME: Mask of the Lunar Eclipse

Not really a guide, but I just wanted to clarify that all upgrades from previous runs are carried over on New Game +, and difficulty achievements don't stack, so you'll probably want to have your first run on Normal, so it'll make it easier for you to beat the game on Hard and then on Nightmare. You must beat it on Hard to unlock Nightmare difficulty.

Also, this game is really not that hard (in comparison with previous games in the franchise). Abuse the Lock On button (LT), and use your lenses and you'll do fine. You can nearly one-shot bosses when you're upgraded and use the right lenses.