Remake of the doujin VN, Killer Queen, with a greatly expanded story. 13 people are locked inside an abandoned building, none of them remember how they got there. Each has a PDA representing a playing card from A to K and a collar device locked around their necks. Each of the 13 PDAs correspond to a different set of objectives ranging from simply surviving to eliminating everyone else. If a player fails to fulfill their PDA's objective within 72 hours or breaks any of the game's rules, their collar will activate and they will die.

Remake of Secret Game Code: Revise with 80% altered story. 14 people have been abducted and confined to small rural village . Each one has a metallic collar around their neck and a PDA representing a playing card from Ace to Joker with unique special function and clear condition, which they have to fulfill before the last day of the game. Clear conditions range from "simple" ones like "Survive until the last day of the game" to more complicated ones like "Clear conditions of all players with cards that represent a prime number are fulfilled". If anyone tries to leave the designated area, breaks one of the game's rules or fail to achieve their clear condition in their own PDA, their collar explodes killing them. This is the "game" of death, where mistrust and manipulation runs rampart and death is common and when "rain starts to fall" ...

Remake of Secret Game Code: Revise with 80% altered story. 14 people have been abducted and confined to small rural village . Each one has a metallic collar around their neck and a PDA representing a playing card from Ace to Joker with unique special function and clear condition, which they have to fulfill before the last day of the game. Clear conditions range from "simple" ones like "Survive until the last day of the game" to more complicated ones like "Clear conditions of all players with cards that represent a prime number are fulfilled". If anyone tries to leave the designated area, breaks one of the game's rules or fail to achieve their clear condition in their own PDA, their collar explodes killing them. This is the "game" of death, where mistrust and manipulation runs rampart and death is common and when "rain starts to fall" ...