Xenosaga Episode I Side Quest
Optional Returns and Rewards
This page collects optional work that is easy to lose between story destinations. Segment Addresses , Robot Parts , and Email chains have their own pages because each is large enough to need one.
Return-visit priorities
Luty timing warning
Start: Collect the Flower Seed from the Costmary counter in the Cathedral Ship , then give it to Luty at the Dock Clinic before sleeping at Our Treasure .Do: Leave Dock Colony and return through genuine travel. Talk to Luty after each return while the flower grows. E.V.S. visits do not appear to advance it.If it does not bloom: Continue the story and check again before Song of Nephilim and during the post-Song cleanup .Reward: Tech Upgrade Z Item Target: 1, +100 T.Pts
Start: Hear the Dock Colony fish clue, then speak to the sad woman in the Ironman about her Engagement Ring . Do not trigger the sleep scene at Our Treasure until your early optional returns are finished.Do: Examine the hanging suit in the Kukai Foundation Dry Cleaners, use the Fish Detector at the private beach, catch the Engagement Ring , and return it to the woman.Reward: Decoder 8 Key Item Item required to open Segment Address No. 8Elsa Location The cargo ship that becomes the party’s main transportation hub.Robot Part Left Leg Key Item Give to the Professor at the Robot Academy; both legs give Dominion Tank.
Start: During the Encephalon forest route, collect the S. Carrot Juice and reach Bunnie’s house.Do: Place one S. Carrot Juice on the stump, wait for Bunnie to come outside, then race through the door before Bunnie returns.Reward: Decoder 3 Key Item Item required to open Segment Address No. 3Kukai Foundation Location The Foundation colony and its City Sector 26 & 27.Robot Part Right Leg Key Item Give to Professor at Robot Academy; both legs give Dominion Tank
Start: Use the game terminal at the Kukai Foundation A.G.W.S. Parts Shop and Foundation Robot Academy .Answers: Talk to Me ; Professor; smelly-looking purple T-shirt; Holgar; Luty .Reward: PM Card C Key Item Opens from Key Items for three Bunnie XenoCards; earned by completing the Robot Academy quiz.XenoCard Minigame A collectible card minigame in which each player's deck is both the life total and the resource used to play cards.
Start: Wait until Jr. has joined the party. Make Jr. the on-screen leader and save in the Durandal Residential Area.Do: Enter the bedroom with the U.M.N. shop, destroy the right closet door, and accept the optional fight. Great Joe has 9,999 HP and is much safer as a late-game return.Rewards: Swimsuit Character Accessory Earn 25% more T.PtsSoul Rhapsody Tech Attack Jr.: Ether Tech Attack that absorbs a Gnosis target.Magnum Joe Ether Jr.: One-use-per-battle Great Joe summon against one enemy.
Start: Make MOMO the on-screen leader during the Kukai Foundation evacuation or the final-cleanup window before Proto Merkabah .Do: Follow the Kukai Foundation Aftermath route across the awnings to the hidden room above the Ironman . Bring an all-female party if you want to avoid Mintia ‘s counterattack against male attackers.Rewards: Steal Craft Apron Character Accessory Skill P+25 (+25% S.Pts)Mintia for Penguin Rod Character Weapon MOMO weapon: Physical Attack +7; can Slow Biological and Gnosis enemies.Dark Scepter Tech Attack MOMO: Physical Tech Attack that can turn a Gnosis enemy into an item.
Start: Revisit the U-TIC Battleship through E.V.S. and return to the room where you fought Zolfo .Before Song of Nephilim : Defeating Ace Pilot leads into the Meld Gareth encounter.After Song of Nephilim : Defeating Ace Pilot normally leads into Din Gareth . To fight Meld Gareth instead, finish Ace Pilot while at least two party members are aboard their A.G.W.S. units.Use: These encounters are repeatable and provide EXP and upgrade points rather than a unique completion reward.
Why the Fish Detector route matters
The Fish Detector sequence feeds three systems at once: it yields ordinary beach catches, recovers the Engagement Ring , and earns Decoder 8 . Decoder 8 opens the Elsa Segment containing Robot Part Left Leg , which advances the Erde Kaiser chain. That is exactly the kind of side quest worth doing even if fishing for a Med Kit does not ordinarily thrill you.