Start the game after beating Xenosaga II.
Complete chapter 1.
Complete world 1 of HaKox.
Complete world 2 of HaKox.
Complete world 3 of HaKox.
Complete world 4 of HaKox.
Complete world 5 of HaKox.
Complete world 6 of HaKox.
Unlock the secret menu item at the Cafe Stream and obtain your reward.
Rescue KOS-MOS without alerting a guard or using a trap with less than 6 battles.
Complete chapter 2.
Obtain Shion's swimsuit.
Defeat E.S. Naphtali without using Anima.
Defeat T-elos at Rennes-le-Château using nothing but standard attacks (Level Limit: 20).
Complete chapter 3.
Complete chapter 4.
Obtain Jr's swimsuit.
Complete chapter 5.
Defeat Voyager in less than 7 minutes (Level limit: 25).
Obtain Momo's swimsuit.
Obtain Jin's swimsuit.
Obtain 50,000G for completing the Labyrinthos puzzle on the first attempt.
Defeat Ω Universitas using your default equipment with no items.
Complete chapter 6.
Win the top 3 prizes from the 777th Challenge Coupon session.
Save the ice cream vendor and his daughter from a grisly fate.
Defeat Blue Testament by recreating his original death.
Have Shion defeat all 3 27-Series Asura Realians at the same time without anyone being broken (Level limit: 32).
Complete chapter 7.
Obtain Chaos' swimsuit.
Complete Shion's skill line.
Complete Jin's skill line.
Complete MOMO's skill line.
Complete Ziggy's skill line.
Complete KOS-MOS' skill line.
Complete chaos' skill line.
Complete Jr.'s skill line.
Defeat Dmitri Yuriev without Ω making a move (Level limit: 50).
Defeat Ω Metempsychosis without using anima.
Complete chapter 8.
Complete the Seven Moons sidequest.
Obtain Shion's ultimate weapon.
Obtain Jin's ultimate weapon.
Obtain Chaos' ultimate weapon.
Defeat Ω Id.
Obtain Momo's ultimate weapon.
Defeat Erde Kaiser Σ.
Defeat Erde Kaiser Σ without using any of the other Erde Kaisers (Level limit: 60).
Obtain KOS-MOS' swimsuit.
Obtain KOS-MOS' ultimate weapon.
Defeat E.S. Levi without any form of healing.
Obtain KOS-MOS' costume from the first game.
Obtain Ziggy's ultimate weapon.
Collect every treasure from a treasure chest.
Collect every treasure from a destructable object.
Obtain a piece of equipment from Red Testament and his partner.
Complete the database and obtain your reward.
Beat the game.