Hidden Facility: Deathstroke Predator: 3 Medals: Black Mask Challenge Pack - Batman Arkham Origins

This map is somewhat challenging with a lot of armored guys and a sniper. But somehow the sniper doesn't seem to notice you wreaking havoc behind him in the beginning.
Start out by stringing up the two closest guys and use the propane tank to dispatch the armored guard. Then you can string up the unarmored guy in the back before dropping down and do a batclaw knockdown on the sniper.
1st Medal
Then you can pull the armored guy off the upper level across from you for the first medal.
2nd Medal
The last unarmored guy should be just running up below. Batclaw disarm him and while he is picking up his gun, you can attach the fire extinguisher to him and do the silent takedown in the smoke for the 2nd medal. There seems to be a very frustrating bug here as a lot of the time, you dont get the medal despite you have followed guideline to the letter.
3rd Medal
After you took down the unarmored guy, the last guy should move into your position. You can batclaw an pull him towards the adjacent grates. You can then do the grate take down for the 3rd medal while he is picking up his gun without the need for a stun grenade.

[@TheWrongHarvey2]

There are several ways to get the Extinguished medal. With the guard in the smoke, you can get it by silent takedown, ground takedown, grate takedown, and trip takedown. Hope this helps. Love your vids, mate. :)

[@billa5830]

Thanks for the tip! I will give it a try

[@ellankih]

50s, incredible man. Lol, I did this mission in 6 min or so. I got grate moves and fall guy medals quickly but that fire extinguisher was bugged. I got it only when I did silent take down on unarmoured guys. When I did same on armoured guys with ground pound it didn't work!

[@billa5830]

Thanks! This is a pretty annoying bug. I am going to experiment some more and see what I can come up with

[@romanthegreatwarrior2377]

I really want this... but I can't because xlive

[@TheWrongHarvey2]

Took this map to 36 seconds so far. :) Vid is on my channel. Love the new Bruce Wayne Checking Out video. :)