(If it doesn’t work on your setup, try only pressing Spacebar once instead of holding it.)
With “Main Game” highlighted, on a PC keyboard hold down the Shift + Spacebar keys, then press: W, A, S, D, R, I, E, F. With “Main Game” highlighted, on an Xbox controller hold down the LB + RB shoulder buttons, then press: Up, Left, Down, Right, X, Y, B, A, A. With “Main Game” highlighted, on a PlayStation controller hold down the L1 + R1 shoulder buttons, then press: Up, Left, Down, Right, Square, Triangle, Circle, X, X.