Mission: Scarlet Stars

You play the role of Stephan, a service robot who awakens in a cell located deep within a seemingly long-abandoned prison complex alongside 15 humans, shortly before the group is informed by a bizarrely childish robotic girl calling herself "Estelia" that they have all been chosen as the participants for a killing game. With no way of knowing who they can truly trust, the group soon finds relationships both old and new being tested to their limit as they attempt to investigate the seemingly inescapable halls together, their captor's promises of a way out should they successfully get away with committing murder becoming all the more tempting as their numbers slowly begin to dwindle.