The MW2 code is required during the first raid, Atomgrad. The three-player cooperative experience in Modern Warfare 2 continues from where the campaign left off, but you'll need to grab some pals ...

Randomly scramble the digits 0, 1, 2, 3, 4, 5 and 6 to form a seven-digit number (or a six-digit number if the leading digit is 0). Rank the following events in order ...