Fastest way I've found to get the weapons without a lot of save exit farming of chests. Trade the weapons and progress through the quest normally. Load your main profile also adding the secondary profile then goto Triton Flats for the quest. You should be able to buy (at a cheap price) and hold 14 white items at a time if there is 14 on offer (12 + 2 equipped). In here you will have your first access to a Gun vending machine (two of them actually, one at the start and one inside the Holodome). Load up the second profile character (only them or it will skew prices) again and Fast Travel to the Holodome. Load up your main character and add the second profile character to your group. Make another character on the second profile and get them to the point where you first get missions from Janey (this from memory is the first point where you can use the Fast Travel stations). The story line will then want you to go to Helios. Tip for "To Arms!" if you have a second controller and profile. The Secret Achievement achievement in Borderlands: The Pre-Sequel (Xbox 360) worth 26 points Continue playing to unlock this secret achievement. Easiest way to keep track of what you are missing is to copy and paste the list into a word document and either check off as you complete them or delete them. Maybe it'll tell us somethin' interestin' (Plug device into console) Pickle: Cor Looks like someone snuck a secret room into the Drakensburg, and it's marked on this map Wonder if anyone else found it. You do not need any of the DLC Completed even if you own it or even started it. (Accept mission) Pickle: That looks like an old Drakensburg data device That's well juicy Not that I'm monitoring your activities or nothin'. Intelligences of the Artificial Persuasion (Main Story) Nothing is Never an Option (Reported possible glitch the boomers may not show up after the waves of scavs by TMONEYRKO619)
Sterwin Forever (After completing Main Story) The Bestest Story Ever Told (After Completing main story) If you do have an issue locating anything please leave a comment so I can add where to find them in case others have the same issue. The safest way (which is what I did) is to not work on the next step of the main story until you have picked up all exclamation marks and completed all active side quests (At Arms excluded, work on that one over time) I did not have a hard time finding any of the "Undiscovered" Quests. I do not believe any of them are missable however I can not say that for sure. This is a list of all the quests that were completed when I popped the achievement.