Silent Hill Heaven

I am sorry if this has been answered before, but what is the maximum?

And how you raise the multiplier?

I just finished the game and i am at x2

Thanks in advance

I don't know the maximum, but you raise the multiplier each time you beat the game.

I'm not sure the maximum matters after a point, though, haha. At 5x you're getting so many bullets, unless you're firing them willy-nilly, you shouldn't run out.