This is an addictive platform game that you can enjoy on this page, for free. You will find William and Sly unblocked on CrazyGames. William and Sly is made with Flash technology to run in modern browsers. It has received 25,725 plays and has been rated 9.1 out of 10 with 432 votes. Did you like playing this adventure game? Then check out our other platform games or Fly Car Stunt and Raze.