Shankton State Pen is one of the maps present in the main game. It is labelled as "moderate", featuring an indoor school built on a empty plain. It holds 20 students (yourself included) and has 10 guards.
Rundown of The PenEdit
The prison has several Security Cameras and Contriband Detectors around several areas, such as the south exit, cafeteria, gym, showers, and work areas. A Contriband Pouch is crucial if one needs to transport contriband throughout these areas (or simply do business in the main area instead). The school is fenced, and the fence is surrounded by a unbreakable wall.
Behind your cell, there is a ladder and prison stash. Dig away the wall and place a poster. The utility hall has a ladder leading up, which then requires a utility key to pass and get onto the roof. Head down, dig under the wall, and escape!