Check on Mordecai is an objective in the Story Mission, The Cost of Progress in Borderlands 2: Commander Lilith and the Fight For Sanctuary
- Having blasted open the bunker with Cassius, it is time to head back to the Backburner to check on Mordecai.
- Use the nearby Fast Travel Station to quickly get there.
- Once in the Backburner, go up the nearby stairs and look just to the right of the entrance of the headquarters.
- You will see Lilith, Tina, and Mordecai there.
- Approach them to trigger the next objective.