I wish to say
Check again mates, you can get it even smaller!
No hints, but try...
My COD repacks that are better than most:
Call of Duty - Modern Warfare - 3.80GB
Call of Duty - Modern Warfare 2 - 10.5GB
Call of Duty - Modern Warfare 2 NO MP - 10.5GB
Call of Duty - Modern Warfare 3 - 7.72GB
Call of Duty - Black Ops - 3.00GB
Surely, If I can do that, you can...