Halo 4's leak hasn't fazed 343 Industries' Frank O'Connor in the slightest, as such occurrences are "inevitable."
"There are people putting the whole thing on YouTube," he said. "Microsoft is addressing that a single case at a time, it just takes a little while to handle."
"This is how surprised I am about this," O'Connor said as he shrugged.
The game's leak is rumored to have come from a production facility.
Halo 4 is out November 6.