Hi All
We have updated the game to fix some of the issues you are having unlocking certain achievements.
Update Details
"Rocket Training Complete" and "Survivor's Call" have been fixed and should now be unlockable.
We apologize for the inconvenience, but we hope you keep enjoying Vertical Strike Endless Challenge.
http://store.steampowered.com/app/313390/Vertical_Strike_Endless_Challenge/