Run 1 Unblocked Game
Play Run 1 in the Adventure mode and adjust the speed as fast or normal according to something that you can keep up with.
Then you will be asked to choose from screens 1, 2, and 3. Choose any and start running. You can use Up Arrow or Spacebar to jump, or left and right arrow keys to go left or right. However, Run 3 is the latest version if you want to play that.