The demon parkour is the hardest parkour you can get.

STORROR PARKOUR PRO WILL BE THE WORLD'S FIRST ONLINE MULTIPLAYER PARKOUR VIDEO GAME!

Both the mobile and browser versions of the game use bots for the opposing "players", but a real live multiplayer version exists called Paperio live.

paper.io has been exposed multiple times for being a fake multiplayer game! Yeah, that's right, you've been fighting against noob bots all along... You can turn off your WiFi and still play the app.