- Engine Startup Sound remixed from sample "jet engine start CRJ 900" by user alex36917 on FreeSound.org https://freesound.org/people/alex36917/

- Mining Drill sound remixed from sample "Construction, Jackhammer Excavator, A.wav" by user InspectorJ on FreeSound.org
https://freesound.org/people/InspectorJ/sounds/400991/

