I can't buy new campagne missions, and some others. I ve bought the five ones at the shop, but I can't reach after the 3Oth mission... The following missions are locked...

How can you finish all training mode? I get 3 weapons training modes, but I don't have the training medal....

Could you help me, please?

i remember having the same problem because i did not finish one of the solo missions. so i made all the mission again starting from zero because i did not know which one was left...

Did it work?

I thought there was an icon next to the challenges to show which ones you have done. The only one that doesn't have that is the training missions.