how much memory does halo 3 take up on xbox 360 arcade?

[Jason]

I'm going to buy a xbox 360 (arcade) and i plan on buying halo 3 and i don't plan on getting live anytime soon, i just want to play the campaign and some multiplayer so will i need to buy a hardrive too

 

[zain]

not really you got plenty of space for it as is.