Check out the online modes & local multiplayer modes in ARMS for ARMS - Grand Prix, Online & Local. ARMS Grand Prix Co-op/ Multiplayer gameplay for Nintendo Switch! Subscribe to see every PB&Jeff video. Grand Prix Multiplication is a multiplayer math game that allows students from anywhere in the world to race against each other while practicing their. Race your classmates or make a few online friends. Unknown Soldier View Profile View Posts. Link To Us Links Blog Word Games. These racing cars run on math power. Multiply the fun by solving each problem as fast as you. Popular Games View All.