First off I feel establishing how I’m interpreting this challenge is important. As per the in-game text states : “Kill a Monster, a Special, and an Elite in a single Crank Gun activation.”
My interpretation : You activate your Crank Gun, and get the killing blow on a Monster, a Special and an Elite before you stow/put away your Crank Gun.
If that interpretation is correct, then I believe I have achieved those conditions three different times now; the last one being very clear as I ran my Crank Gun for about nine minutes in-game from the start of the mission.
Steps to reproduce : Kill a Monster, a Special and an Elite with a Crank Gun in a single activation and return to keep. (No challenge completion notice/actual in Okri’s Challenge.) * May be prudent to note, I have not looked at the Quests portion AT ALL since the Outcast Engineer release.
Consistency : Very confident this has happened three times now. All before Hot fix 184.108.40.206 was released though.
Evidence : Sorry, none available.
Even with these (very minor) bugs, thanks for the great DLC Fatshark! Stay safe everyone!