To Avenge a Fallen Star (United Planetary Systems #1) by Qilanna Quinn:
 
It is the year 2562, and centuries have passed since mankind left the Milky Way in search of a better life. For most, the dream of a grander existence has become a reality. But for the descendants of exiled criminals, sentenced to live on the harsh red planet of Reva, their only dream is reaching twenty years of age and passing their Oranos Trials, which grants them unrestricted citizenship in the United Planetary Systems—and freedom from Reva.
 
For Gemma’s sister, three years ago, her dream was no different. But just one day after passing her Trials, she was murdered. Desperate for vengeance, Gemma joined a rebel organization with the power to help her execute punishment. And now, twenty-years-old herself, it’s Gemma’s turn to enter the Oranos Trials, where she will finally exact retribution on the man who murdered her sister: the Game Master himself, Rami.
 
But her mission quickly unravels when she discovers a far darker conspiracy is at play. As hidden enemies reveal themselves, some closer than she could have imagined, Gemma must forge unexpected alliances to confront the even greater threat. Her very life—and Reva’s future—may depend on it.