These were bugged for me, i was able to unlock them ingame, however they failed to open on steam. I didn't notice any progress going on with them, "Enemies killed" and "Peggings" were at zero on steam at the time i've achieved them in game. However i've noticed there was progress with "Balls of steel", at some point i had 19/20 to open it.

To avoid the hassle I've used SAM to open them, but i guess not everyone is comfortable with it.

Other than that, keep up the good work, i've really enjoyed the game :)