Return to Tina is an objective in the Story Mission, Shooting The Moon in Borderlands 2: Commander Lilith and the Fight For Sanctuary
- With the Power Core collected, head to the South.
- Follow this short hallway to the South.
- Step onto the Elevator to the West and hit the green button to be taken up to the upper level of the Arsenal.
- Go to the Southeast to make your way back toward Tina.
- This will give you passage back to Munitions Loading and let you return to Tiny Tina.