Dark Rose Valkyrie is a Japanese role-playing video game developed by Compile Heart and published by Idea Factory. Released on PS4 in 2016, the game is set in an alternate history 1929, where players must lead an elite military force known as ACID to combat the Chimera Virus, responsible for turning people into monsters. Featuring real-time combat with a strategic transformation system, the player's decisions can affect the game's direction through multiple endings.