- minor qol for guards/riot guards walking sounds

- staff can now use phone cabinet, phone booth and video call booth during breaks when placed in staff only sectors (StaffRecreation)

- minor optimisation

- guards will no longer man checkpoints when Stay Indoors order is active (to prevent accidental deaths when playing with extreme weather conditions)

- minor tweak

- updated checkpoint description
- corrected some typos

- corrected the descriptions of some rooms and logistical options

- more sniper fixes