I don't know where to start with this game. It has certainly earned itself a place in my favourite games list, right at the very top.
The gameplay has two modes. There is story mode, and puzzle mode. It should be pointed out that for the most part, this is a visual novel. Of course, puzzle mode means there is actually gameplay, but it is extremely text heavy. Don't let this put you off though, because it all comes together beautifully.
I normally hate puzzles. Whenever I play games like Layton, I rush them and just focus on the storyline. 999 puzzles are different. They are fun, and for once I didn't need a walkthrough. This is a change, and I normally get extremely frustrated by the amount of illogical decisions made in game puzzles. I've heard some say they are too easy, but I didn't think this. Just right level of difficulty I think.
The story in this game, is incredible. The game has 6 endings, and you can only truly appreciate this game once you've played all 6. Don't worry, once you've completed the game once, you can speed through text you've already seen.
The characters seemed hollow at first, but soon after spending time with them on different playthroughs, you start to learn more about them, and their personalities. I soon loved all of them, and found them all interesting.
The music is great, and fits with the themes 100%. I was really impressed by it, actually.
I don't have anything bad to say about this game...
I was hesitant to buy it initially, because of the price. It hasn't had an EU release, which explains it's slightly higher price tag. It is worth every penny though. I wish I could get amnesia to experience this game again!
No excuses, order it now. It's amazing.