That being said, this anime follows Corpse Party: Blood Covered (PSP) very well, even with some major changes, so I highly recommend not spoiling the game for yourself and go play it before watching Tortured Souls.
You can thank me later because alot, if not most, of the story is beautifully animated within these four gruesomely awesome episodes. Definitely not for the faint of heart but highly recommended for any fans of the series as well as horror.
So in other words, play Corpse Party: Blood Covered first for the PSP and after falling in love with this masterpiece continue on to the second game (Book Of Shadows). All you really need is to play the first chapter though of the second one before watching Tortured Souls.
But trust me on this one, the experience is going to differ depending on if you actually beat the first game. You will have more of a bond with each character knowing their story, at least I know I did. Play the games then watch this anime, you won't regret it.
