Themes are an integral part of storytelling, no matter the medium. Whether it's a TV show, movie, comic book, or video game, any story needs to have at least one central theme that the character's journey revolves around. This theme can be just about anything, from themes of revenge to love to acceptance to sadness, and as long as at least one theme is there, a story will have a good chance of resonating with at least a portion of the audience. Being the sequel to one of the best Indie games in recent years, it's likely that Hades 2 is going to have a very strong central theme.