Tartarus is the mysterious, ever-changing tower that appears during the Dark Hour. It's your primary dungeon-crawling location where you'll fight Shadows, gain experience, and discover the truth behind the Dark Hour. Each visit to Tartarus is a strategic endeavor, requiring careful planning and resource management.

Key Tartarus Mechanics:
- Floors: Tartarus is divided into multiple blocks, each with numerous floors. Floors are procedurally generated.
- Shadows: Enemies you encounter. Each has weaknesses and resistances. Exploit weaknesses for 'One More' turns.
- The Dark Hour: The time between one day and the next when Tartarus appears. You can only enter Tartarus during this period.
- Fatigue: Characters can become 'Tired' or 'Sick' after prolonged stays in Tartarus, reducing their effectiveness. Manage your party's condition.
- Monad Doors: Special doors that lead to challenging encounters with high rewards.
While Persona 5 Tactica emphasizes grid-based positioning, Tartarus focuses on traditional turn-based navigation through procedurally generated floors that challenge your party's endurance over time.
Unlike the character-themed dungeons found in Persona 4 Golden, Tartarus functions as a singular, procedurally generated monolith that evolves as players ascend its many floors.