I've heard it from Bungie before how they hated being limited to only making one franchise and how microsoft rejected their ideas and basically treated them like slaves. I'm pretty sure Sony must have given up a bit of cash for this but I think this is really Bungie getting back at Microsoft for how they treated them. I'm a PlayStation guy and I don't blame Bungie for this but I must say its kinda harsh to their Halo fans. Like I said though Microsoft must have really pissed them off.