I just finished Virtues Last Reward last night. The sequel for 999. It's really insane from a story perspective. Probably more so than 999, which is already crazy to begin with. I feel like it more tightly couples the puzzle rooms with the story, but I found myself starting to just look up the solutions to the last couple puzzles as I went through it. Part of that was its absurdly long comparatively. I clocked in at close to 40 hours or so at the end. And at a certain point I was kinda getting tired of going through the motions over and over. The game gives you a timeline to jump around on which alleviates some of the issues with the first game. Although for the iOS version of 999 I believe they added that feature in as well. You can also similarly fast forward through text but since it'll pause on new text you often have to re-engage this. It's nice to see the extra text but there are times when it deviates ever so slightly for a couple sentences and then you can fast forward again. At the very least if you liked the story from that first game I think you'd like this one. I would recommend a guide though. There's an image that I was using that sort of illustrates an "optimal" way to play the story which worked out nicely. It just tells you which doors you should go through and which decisions you would make. It works pretty well story-wise.