A database that has been hacked.
Databases are mainframe devices which can be hacked to reveal information about the facility.
Databases provide soft cover, allowing agents to hide on adjacent tiles.
When hacked, a Console Database reveals the locations of all Consoles in the facility.
When hacked, a Daemon Database reveals information about daemons on all mainframe devices in the facility.
At mission difficulty 2 and higher, every facility has one Daemon Database in addition to its other Database(s).
When hacked, a Facility Database reveals the outline of the facility map. The outline can be used to identify dead ends, as well as the likely locations of objective rooms and the exit room.