Hi! Thank you for the kind words, we are happy you liked the game so far!
Just to be certain we are talking about the same thing, you mentioned you finished level 15 in normal mode. Are you talking about story mode? Or are you saying you won story mode, THEN also infiltrated 15 soldiers in infinite mode-normal?
Another thing that would be useful is if you could tell us which store/platform you are playing on (Oculus store or Steam)
Empty Clip Studios