The Knowing Is Half The Battle trophy in Borderlands 2 is story-related and can't be missed.
You will unlock the trophy once you complete the "Data Mining" story mission.
*** Spoiler - click to reveal ***- Head to the main pipeline
- Reach Hyperion Info Stockade
- Overload pump station 1: 0/2
- Find second pump station
- Overload pump station 2: 0/2
- Find third pump station
- Overload pump station 3: 0/2
- Hit pipeline with vehicle
- Enter Hyperion Info Stockade
- Find data access terminal
- Download Warrior location
- Take map data