Moto X3M 4 Winter. Moto X3M is back! The great motocross racing game takes you to the cold snowy mountains and holiday town, where you have to prove you’re the best dirt bike rider ever. Master the tracks, avoid all deadly obstacles and finish every level the fastest you can. Perform cool stunts without getting killed to reduce the time and earn three stars for each level. This game is one of the cool games on Round Games. Enjoy and have fun in playing this free online game.