: A high-difficulty hard mode featuring "Eternal" variants of bosses that have significantly more HP and complex attack patterns.
: Added over 100 new items, including "Trinkets"—passive items like the Polaroid or Curved Horn that are held in a separate slot and provide unique buffs.
: Added alternate floor versions like The Cellar (Basement alt) and Catacombs (Caves alt), which feature tougher monsters and different layouts.
: Integrated 20+ new bosses and 40+ new enemy types, increasing the variety and difficulty of encounters.