From the PDF A Simple Hobby Game for 1 to 8 Players In the real world, Pro Circuit Racing is a game that models small scale races around a closed circuit. It's a racing game for 1 to 8 players (or more if you feel the need) that is controlled by rolling dice to see how far cars race. However, it has a mythology all its own... The PCR Concept Pro Circuit Racing, or PCR, is a race concept developed to be friendly to the spectators, cheap and environmentally friendly. It is a busy race day with non-stop action.