This game is provided via Steam key. For key redemption a free steam account is required.
Show your ACID pride with the Dark Rose Vakyrie Deluxe Pack!
・Character Art Collection - Character art of the members of the Special Force Valkyrie team. Find the traitor!
・Rough Art Collection - ACID's record of character sketches, Chimera designs, Valkyrie designs, and map images. Contains knowledge that will be essential in order to battle the looming danger of the Chimera Virus.
・(x5) PC wallpaper - Customize your PC with ACID-certified PC wallpapers.
・(x4) Mobile wallpaper - Take the Special Force Valkyrie team with you everywhere using these mobile wallpapers.