This challenge can be a little bit tricky depending on how the thugs follow you. I provide a realistic simulation on how to complete this challenge with both speed and no damage taken.
Played on PC with mouse and keyboard.
Final Time: 42.23 seconds
Blast Zone - Explode a weak wall into a henchman to knock him out.
Knockout Smash - During a Silent Takedown perform a Knockout Smash to takedown the henchman instantly.
Window Pain - Perform a Takedown through a glass window
After taking out the guy with a "Knockout Smash" as shown grapple directly up and proceed to air kick the thug directly in front of you, (you may use the Dive Bomb Tackle for the extra speed and letting it go before you hit the thug so it doesn't take as long to recover) then take him out with a ground pound.
Make sure the thugs see you and run into the room in front as they will run and follow you, when you are inside the thugs will slow down providing you with the time to put Explosive Gel onto the weak wall.
Depending on which way the thugs go either perform the "Window Smash" or "Blast Zone" first depending on how they move. When performing the "Blast Zone" trophy if possible try and get 2 thugs near the wall but if they are too far apart just explode the wall with the one thug and and punch the last thug as it only takes 3 hits to finish him.
The other possibility is exploding the wall, then "Window Smash" before punching the last thug. Make sure the window is not shattered or else you will not get the trophy.
Hope this is useful for you getting your challenge complete!
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