You may or may not have heard the term "ontological mystery" before, but if you're the kind of person that reads a blog like this, you've probably already encountered some. An ontological mystery is essentially a story where the characters find themselves in an unfamiliar and often limited setting, and one of the main focuses of the story is learning about and escaping from the setting. I've already reviewed a few of them. Other major questions often include why these people in particular were chosen and who is behind everything.
Birth ME Code, the second game in the ABiMe series, takes this sub-genre and flips it on its head by letting you play as the mastermind and tasking you with ensuring your death game runs smoothly. (Well... Without naming any names, a fair number of ontological mysteries are convoluted enough where it turns out by the end that you were the mastermind the whole time. But Birth ME Code is different because it bakes this into the premise.)
Or at least, it tries to flip the sub-genre on its head. It's a solid ontological mystery, especially considering it was all done by one guy (even if he calls himself "Team" Miracle Moon), and a noticeable improvement from his previous game, Head AS Code. There's a lot to like, and Birth ME Code will undoubtedly scratch your itch if you're looking for games like Zero Escape or Danganronpa, but, along with a few other pitfalls, it never really manages to live up to its central conceit.