23/01/2021 - played 117 hours since New Years and for the past 3 Days I have been googling, troubleshooting and what not. Nothing on the world wide web seems to work.
Just like OP my list of Steam-Achievements which didn’t pop is astonishingly long:
- Slaughterhouse 3 (I did all 3 after another in one go, did not work)
- A Hundred Names For Sand (convinced I discovered them all, because " Master Of All You Survey" popped)
- Swamped (convinced I discovered them all, because " Master Of All You Survey" popped)
- City Slicker (convinced I discovered them all, because " Master Of All You Survey" popped)
- Getting A Little On The Side (In-Game Counter for Galaxy/Planets/Zones shows I done them all)
- 100-Proof (just like the above, nothing more to find, no more ! - on any map)
- Got Big Game (In-Game Tracker shows them all done)
- Zer0ed In (In-Game Tracker shows them all done)
For the past 2 days, no solution I found online helped me in this situation.
Today I spent approx. 5 Hours visiting and re-discoverin EVERY SINGLE LOCATION on Pandora. For nothing to happen. The same for Promethea. Yesterday I spent multiple hours driving inbetween Pitt’s Stop and Logan’s Spar for a couple of players reported that this way the Achievement popped after some time. But also here, nothing. After todays Odyssee, this is my final and last straw. It is so tragic that the SAME issues were already on the former parts, Borderlands 2 and the Pre-Sequel.
I have no clue why I actually fell into the K2/Gearbox Trap again.