Superluminal Vagrant Twin stands out for its unusual format for IF and for its understated, evocative writing that makes the world feel complex and immersive without facing the player with a wall of text. Its mechanics feel quite different from standard IF and work well with the feel. I feel it's main weakness is the lack of a satisfying climax: you gradually figure out more about the world and how to use the mechanics effectively, and then you do that and win without surprises or twists. While there are multiple options, it didn't feel like it mattered which one you picked, and I kept waiting for moral choices or other elaborations on the formula. That said, it was well worth playing and a lot of fun.