|Tomb Raider: Underworld levels|
Father's Secret Study is the first bonus level exclusively for the Xbox 360. The actual game name is Tomb Raider: Underworld: Beneath the Ashes. In it, Lara attempts to locate an artifact that her father left in the Croft Manor, it had the power to create and control Thralls.
- Doppelgänger (end only)
- Medieval Dungeon under Croft Manor
- 28x Treasure
- 1x Relic