Circuit Challenge is the most realistic Formula 1 Free to play game, in this game you play as F1 racer. This game have 8 different Circuits to test your driving skills. You have to finish the race in the top 3 to unlock the next Circuit. Show your driving skills to unlock all the Circuits to win the game. Formula 1, F1 racing, Circuit Challenge, racing game, free-to-play, car game, driving game, unlock circuits, top 3, boost, realistic physics, racing, F1 racer, game, mobile game, racing simulator