Hey guys, I know a lot of people know most of these already but I'm sure there are some people that do not.
Modern Warfare 3 has challenges in it that were left in the code and not implemented or placed in as secret challenges. Some of the secret ones and left overs are shown in my picture below. Some can be unlocked while others such as "6 fears 7" can not be. Anyone know of any others that they have unlocked or know about but have not unlocked yet? P.S. these can only be viewed in nearest completion but can be tracked for later viewing.