Honkai: Star Rail is a 2023 free-to-play turn-based role-playing gacha video game developed and published by miHoYo. It is the fourth installment in the Honkai series and the spiritual successor to Honkai Impact 3rd, featuring alternative versions of characters from earlier titles in the series, as well as gameplay elements from miHoYo's previous game Genshin Impact. The game features the main character, who is referred to as the Trailblazer, traveling across the universe on a train called the Astral Express to help and connect the worlds while involved in resolving various disasters.