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Alpha 15

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The mods menu
  • Much better mod support within the game.
  • All mods should be installed in your AppSaveFolder/PrisonArchitect/mods/ folder.
  • They will then show up in a new Mods interface (Main menu -> Extras -> Mods).
  • You can activate and deactivate as many mods at once as you wish.
  • There are several types of mod:
    • Graphical / Presentation: Updates the graphics and sounds in the game.
    • Translations: Translates the game into languages other than English.
    • Scenarios: Full story driven chapters, similar to our Death Row introduction.
    • Content: Adds items to the sandbox or changes the behaviour of items. E.g. Grants mods which add grants.
  • All mods must have a manifest.txt which details the title, author, version info, etcetera.
  • And mods should come with a thumbnail.png image which will act as a graphical preview.

See also Modding and Mods.


Performance improvement
  • The game now runs much faster, especially on Windows/PC.
  • Lots of unnecessary memory copying has been optimized out. Makes a big difference on Windows particularly.
  • Long running prisons (100+ days) sometimes experienced extreme slowdown due to the list of all contraband.
  • Fixed a bug that caused the building of foundations to become very slow and laggy on large maps.
  • The lighting system has been multi-threaded, freeing up much CPU time.
  • The lighting system now updates at 20 Hz (previously 4 Hz), so changes in light happen quicker as well.

Staff Exhaustion[edit]

  • All staff now become tired as they work.
  • Their energy level is rendered as a green bar in their nameplate (only shown when less than 33%).
  • When they become exhausted they will stop work for a while to recover.
  • You can now build a Staff Room, and exhausted staff will go there in preference.
  • Staff resting in a Staff Room will recover energy much faster, and feel more rested.

Different Federal Grants[edit]

  • Minimum security prisoner: $50 per day.
  • Normal security prisoner: $100 per day.
  • Maximum security prisoner: $150 per day.

Note: Previously you received $100 per prisoner regardless of category.

Clock Speed[edit]

  • New clock speed option: very fast.
  • Runs the game at 5x speed (previous fastest speed was 2x).


  • You can then research Deployment to attach guards to stations, or Patrols to attach guards to patrols.
  • This fixes the issue that you could unlock Patrols before you had access to the Deployment screen.


  • You can now scroll by pushing the mouse to the edge of the screen.


  • Dangers: Shows all the locations around your prison that contraband could be stolen from.
  • 24 hours: Shows all contraband confiscated in the last 24 hours.
  • 7 days: Shows all contraband confiscated in the last 7 days.
  • All time: Shows all contraband confiscated in the history of your jail.
  • In addition, all recovered contraband icons are colour coded:
    • Red: weapons
    • Blue: tools
    • Green: narcotics


Alpha 15b[edit]

A hotfix that was immediately released to address a bug that was introduced into the game from Alpha 15:

  • Fixed: Players were unable to cancel any new jobs they created using right click.

Alpha 15c[edit]

A hotfix released to address a bug that was introduced into the game from Alpha 15:

  • Fixed: Contraband was not being generated.