Probably my favorite game. But I don't know if it's my favorite only because I played it in my childhood. It captures the feeling of exploring the dark reaches of space. The comet observatory is beautiful and the star power-up that lets you fly is the best part of the game. The library was fire; Rosalina's backstory made me cry when I was a kid. When you think you've beaten the game, it tells you that you can now play as Luigi. Luigi solos.