For other uses, see Door (disambiguation).
Solitary Doors are currently the strongest and most expensive doors in the game: they can take the most damage before they break.
Solitary Doors are often used as the main door to enter the prison and to protect the armoury. However, it can still be used for any room in the prison. Solitary doors need to be opened by a Guard, but can still be opened if a prisoner manages to obtain guard keys from a dead/unconscious guard. They can also be opened by remote access systems.
It is recommended to use Remote Doors for the upmost level of security.