Sounds in this folder

soft*.mp3, floor*.mp3, wade*.mp3
  "Footsteps on different surfaces" (OpenGameArt.org), derived from footstep-grass.wav,
  footstep-wood.wav and footstep-concrete.wav by swuing (https://freesound.org/people/swuing/)
  and Water Footsteps by EminYILDIRIM (https://freesound.org/people/EminYILDIRIM/)
  License: CC-BY 3.0 (http://creativecommons.org/licenses/by/3.0/)

sand*.mp3, hit*.mp3, cloth*.mp3
  Kenney (www.kenney.nl), Impact Sounds and RPG Audio – CC0 (see LICENSE-kenney.txt)