It is the sequel to 999. While it is great and I loved playing it all the way through, it wasn't as good as the original. The production value is clearly higher being polygonal graphics, full VO and better puzzles. I did see some of the twists coming but the reveal was exciting none the less. I ended up playing the European 3DS version which is clearly inferior compared to all other version out there as it doesn't have the English VO which sucks and it has a game ruining save bug which can delete your entire progress. Clearly the version to get is the North American Vita version. But since I don't have a Vita and I wasn't going to buy one just for this I had to settle for this version. Still though, it's a great game. I'm looking forward to the next one when ever it comes out.