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Sub-Level 13 is an optional mission in Borderlands: The Pre-Sequel.
- Find Sub-Level 13 entrance
- Descend to Sub-Level 13
- Disable junction box
- Search vents
- Find space-fold inverter
- Listen to Harry's ECHO
- "Poor Harry. Guess he won't be needing whatever loot he's got on him anymore."
Turn In: Harry's Remains
- Completing this mission with a full party unlocks the Who You Gonna Call? achievement/trophy.
- It is much quicker to Fast Travel to Titan Robot Production Plant then exit to Titan Industrial Facility to enter Sub-Level 13.
- "Harry's Remains" is a reference to Harold Ramis, the actor who played Egon Spengler in Ghostbusters.