If you want to find out more about Player/Stage go to this page:
|Player/Stage Simulator Window|
HELP FOR THE CURIOUS OR PEOPLE ATTEMPTING TO INSTALL PLAYER/STAGE
If you want to install it Use this script from github because installing manually is tedious and you can easily mess up... It took me two days to install Player/Stage because there are so many dependencies and if you don't install them you will get a ton of errors when installing Player/Stage.
Link for the script from github:
Video from Youtube with the Roombas in Action