Honkai: Star Rail is a smartphone RPG released by miHoYo.

The genre is a 'Strategy Command RPG,' a type of RPG game where you choose strategies and tactics through commands to enjoy the story.

The Chinese game company miHoYo started the service as its fifth game in April 2023, and will celebrate its half-anniversary in October 2023.
As indicated by the title 'Honkai,' it is the third installment in the 'Honkai series,' following 'Honkai Impact 3rd' and 'Guns GirlZ,' both of which were previously released by miHoYo. The setting is a parallel world where humanity has acquired space exploration technology, differing from the worlds of the previous games.

The basic game system has many similarities with 'Genshin Impact,' also released by miHoYo. However, the setting is more futuristic and space-themed, giving it a completely different feel.

The platforms on which the game is currently available are iOS, iPad OS, Android, and Windows, and it is planned to support PlayStation in the future.

The story takes place in a certain universe. This universe is filled with a mysterious energy material called “Star Cores.” Utilizing these Star Cores, life forms have made exponential advancements, allowing them to travel through space.

One day, a person known as 'Kafka,' famous as a Star Core Hunter, infiltrates a space station.

There, Kafka summons a “Player” from another world and implants a “Star Core” into their body while they are semi-conscious.

Left stranded in an incomprehensible otherworld and implanted with a “Star Core,” the “Player” is at a loss for what to do. The Player decides to join the “Star Rail” to seek Kafka and unravel the mystery of the Star Cores, with the help of various people.