1. The blue card room can get the blue card by opening the blue radiation door, 100% refresh, and the blue card refresh time is one hour.
2. Select the radiation chamber. The blue radiation card can be used to open the blue radiation room.
3. Players can find the blue card room from airports, biochemical laboratories, robber camps and radar stations.
The blue card room is the blue radiation room. The main way to get a blue card is to look for it in the green card room. The green card room will definitely refresh the blue card, so the green card room can be said to be a necessary condition for opening other rooms. Except for the green card room, other ways to obtain blue cards depend on luck.