I believe that Devs are focusing on Console version of the game these days.

Can't rescue soldiers in mission 1

Operation Reckoning

환희작전에서 다끝내고 보트탔는데 보트가 움직이질 않음~

Can't progress in Operation Reunite mission 11

Achievement not unlocking for all missions done in highest difficulty.

Why in my game there are only 3 missions if it says there are 14?

COOP Server - Host disconnected - connection lost

Guys, I received a response from Devs.

2 machines

difficulty