From GRAY RAVENS
To unlock Ultimate Zone, you must reach a total score of 1-million points in Advanced Phantom Pain Cage. However, there are three potential pools this randomization can draw from: Group α (Alpha), Group β (Beta), and Group γ (Gamma). Bosses within the same Group cannot be fought within the same week. It features new and returning bosses, all of whom have far higher stats than in lower tiers, and different rewards.
- Group α contains Qu, Gabriel, Nozzle, Unknown Construct α, and Sharkspeare.
- Group β contains Siren, Machiavelli, Huaxu, and Amberia.
- Group γ contains Pterygota Queen, Camu, Rosetta, and Musashi IX.