This achievement requires you to complete five challenges throughout Blackreef. They can be done in any order.
Charlies Reward SchemeView on youtube
Go to Karl's Bay in the evening.
To get the Legendary Heritage shotgun, and finish the Super Shifty lead. You'll want to go to Karl's Bay in the Evening where there are a bunch of reward boxes around the map. Enter Fathoms of Lament, and check the map. This shows you which boxes need opening.
Some NPCs will open the boxes out in the open if you don't. Some explode, some have a trinket.View full guide for Charlies Reward Scheme
Charlie's Wake Up ChallengeView on youtube
Head to The Complex Morning and open all four boxes in the time limit. Find the first gift box and open it. This triggers a timer where you must rush around and open the remaining three.
The YerhvaView on youtube
View The Yerhva answers
Haul-A-QuinView on youtube
This is a multi-step challenge and starts in Karl's Bay Morning. You must save Amador in Hanger 2 in order to access the Big Smiley mask shop in the afternoon.
Use the Delivery Booth to order a Crank Wheel. Find a battery.
In the afternoon collect the crank wheel, the head from Big Smiley, and find a turret. Assemble the Haul-A-Quin.View full guide for Haul-A-Quin
The MoxieView on youtube
Updaam Afternoon. Enter The Moxie and complete the challenges within the time limits.
Updaam Morning allows you to hack the machine, in the door to the left of the Moxie entrance in the cliff.