Colony Tau sits in the Pentelas region as one of the most quest-dense hubs in Xenoblade Chronicles 3, yet many players miss its best rewards because the unlock chain is not obvious. This walkthrough covers every Colony Tau quest, the hidden Colony Gamma quests, and the fastest route to max affinity so you can grab rare accessories and class unlocks without backtracking.
Colony Tau Quest Unlock Order and Prerequisites
Colony Tau does not hand you its full quest list at once, which is why a clear unlock order saves hours of wandering. The colony becomes accessible after the party reaches the Pentelas region during Chapter 4, but the real quest chain only opens after you complete the Tau-Tirkin Alliance story beat and raise affinity past the first threshold. Community reports consistently note that players who rush the main story past Chapter 5 often lock themselves out of early Tau side content until they return and clear the surrounding Tirkin camps.
The first wave of quests includes Lean Times in Colony Tau, A Deep-Seated Scar, and The Lost Nopon Caravan, all of which appear on the colony notice board after the initial affinity bump. Each quest rewards between 800 and 1,200 Affinity Points, which feeds directly into the next unlock tier. The following table maps the early unlock chain so you can plan your route without guessing.
| Quest Name | Unlock Condition | Recommended Level | Key Reward |
|---|---|---|---|
| Lean Times in Colony Tau | Reach Pentelas, talk to Yuzet | 24 | 900 Affinity, Nopon Coin |
| A Deep-Seated Scar | Complete Lean Times, talk to Travis | 26 | 1,100 Affinity, Defender Gem |
| The Lost Nopon Caravan | Complete A Deep-Seated Scar | 27 | 1,200 Affinity, Rare Accessory |
| Tau-Tirkin Alliance | Main story Chapter 4 | 28 | Hero unlock progress |
The Tau-Tirkin Alliance quest is technically a main story adjacent mission, but it gates nearly every side quest in the colony. Because the quest requires you to defeat three waves of Tirkin enemies around the colony perimeter, you should bring at least one Defender class with high block rate and a Healer with group cleanse. Players who attempt this underleveled often wipe on the third wave because the Tirkin Chieftain applies a stacking attack debuff that is easy to miss in the combat log.
Colony Gamma Quests and the Hidden Affinity Gate
Colony Gamma is the Agnian counterpart to Tau, and its quest list is gated behind a much less obvious affinity requirement. You cannot even see the Colony Gamma quests on the map until you raise Colony Gamma Affinity to rank 2, which requires completing at least two standard quests in the Fornis Region and one Hero quest tied to Teach. The game never explicitly tells you this, which is why so many players report missing the entire Gamma quest chain on a first playthrough.
Once the gate opens, the quest board fills with Gamma's Supply Problem, The Wandering Aspar, and Agnian Pride. These quests are notable because they reward Silver Nopon Coins at a much higher rate than Tau quests, making Gamma the better early farming spot if you need coins for Class Rank unlocks. The table below compares the two colonies so you can decide where to invest your time first.
| Colony | First Quest Unlock | Affinity Gate | Best Reward Type | Nopon Coin Yield |
|---|---|---|---|---|
| Tau | Reach Pentelas | None (story gated) | Defender Gems | Low |
| Gamma | Reach Fornis Region | Rank 2 Affinity | Silver Nopon Coins | High |
| Colony 30 | Reach Chapter 5 | Rank 3 Affinity | Attacker Accessories | Medium |
| The City | Reach Chapter 6 | Rank 4 Affinity | Mixed Rare Items | High |
The Colony Gamma quests also feed directly into the Teach Ascension Quest, which is one of the easiest Ascension quests to miss because it requires both the Gamma affinity gate and a specific conversation trigger at the Gamma Canteen. If you plan to run Teach as a main party member, you should prioritize Gamma quests before moving on to Chapter 6 content, because the Ascension quest becomes temporarily unavailable during certain story beats in the Keves Castle sequence.
Colony 30 Quests and the Valdi Connection
Colony 30 is the first major Agnian colony you encounter, and its quest list is tied almost entirely to the Valdi Hero Quest chain. Unlike Tau and Gamma, Colony 30 quests are not gated behind a hidden affinity number but rather behind your progress with Valdi and the Levnis repair side story. The first quest, A Broken Lift, appears automatically after you recruit Valdi, but the follow-up quests only unlock after you return to Colony 30 with Valdi in the active party.
The Colony 30 quests reward a mix of Attacker Accessories and Ether Cylinders, which are used to upgrade Levnis units around the colony. Because Ether Cylinders are also a currency for several late-game gem crafts, completing the Colony 30 chain early gives you a material stockpile that pays off in Chapter 7. The table below lists the full Colony 30 quest chain in unlock order.
| Quest Name | Prerequisite | Party Requirement | Key Reward |
|---|---|---|---|
| A Broken Lift | Recruit Valdi | None | 1,000 Affinity, Ether Cylinder x3 |
| Levnis Repairs | Complete A Broken Lift | Valdi in party | 1,200 Affinity, Attacker Accessory |
| The Missing Levnis | Complete Levnis Repairs | Valdi in party | 1,400 Affinity, Rare Gem |
| Valdi's Ascension | Colony 30 Affinity Rank 3 | Valdi in party | Class Rank Cap 20 |
The Valdi Ascension Quest is the real prize here because it raises Valdi's class rank cap from 10 to 20, which unlocks Master Arts that are extremely strong on Attacker builds. According to community testing, the Valdi Ascension is one of only three Ascension quests that can be completed before Chapter 6, making it a high-priority target for players who want early power spikes. You should also check the missable quests guide before advancing the story, because several Colony 30 quests become unavailable after the Cloudkeep sequence.
The City Quests and Endgame Affinity Farming
The City unlocks in Chapter 6 and immediately becomes the most quest-dense hub in the game, but its quest list is split across two distinct phases. The first phase includes City on the Brink, The Lost Children, and A Home for the Future, all of which are available immediately after the City becomes a fast-travel point. The second phase, which includes The City's True Purpose and several Nopon quests, only opens after you complete the main story through the Origin reveal.
The City quests are unique because they reward Affinity Points for multiple colonies at once, not just the City itself. This makes them the single best tool for raising colony affinity across the board in the late game, especially if you are trying to unlock every Ascension Quest before the final boss. The table below breaks down the City quest rewards by affinity type.
| City Quest | Colonies Boosted | Affinity Per Colony | Special Reward |
|---|---|---|---|
| City on the Brink | City, Colony 30 | 1,500 each | Rare Accessory |
| The Lost Children | City, Tau, Gamma | 1,200 each | Nopon Coin x5 |
| A Home for the Future | City, Colony 4 | 1,800 each | Defender Gem |
| The City's True Purpose | All Colonies | 2,000 each | Hero Unlock |
The Nopon quests in the City are a separate category that many players overlook because they are not on the main notice board. Instead, you need to talk to Nopon Caravan Leader near the City's eastern gate, who offers a rotating list of Collectopaedia Cards and delivery quests. These Nopon quests are the fastest way to farm Silver Nopon Coins in the late game, because each delivery quest rewards between 3 and 5 coins for items you can buy directly from the City's Nopon Merchant.
How to Raise Colony Affinity Fast
Raising colony affinity is the single most important progression system for quest completion, because nearly every Ascension Quest and high-tier side quest is gated behind a specific affinity rank. The fastest method is not grinding standard quests but rather stacking Collectopaedia Cards and Nopon quests, which reward affinity without requiring combat or story progress. According to community data, a focused affinity farming session can raise a colony from rank 1 to rank 4 in under two hours if you prepare the right items in advance.
The core loop is simple: collect every Collectopaedia Card from a colony's notice board, buy the required items from the nearest Nopon Merchant, and turn them in all at once. Because Collectopaedia Cards reward affinity instantly and do not require you to leave the colony, they are dramatically faster than standard quests for pure affinity gain. The table below compares the three main affinity farming methods so you can choose the right one for your current chapter.
| Farming Method | Affinity Per Hour | Requires Combat | Best Chapter |
|---|---|---|---|
| Collectopaedia Cards | 2,000-3,000 | No | Chapter 4+ |
| Nopon Delivery Quests | 1,500-2,500 | No | Chapter 6+ |
| Standard Quests | 800-1,200 | Yes | Any |
| Hero Quests | 1,500-2,000 | Yes | Chapter 5+ |
The affinity guide covers the full Collectopaedia Card checklist and the best item farming routes for each colony. For players who want to push affinity quickly, the key insight is that Nopon quests and Collectopaedia Cards are repeatable, while standard quests are one-time only. This means you should always clear the one-time quests first, then use the repeatable methods to top off any colony that is just short of the next rank.
Frequently Asked Questions
How do I start the Colony Tau quest chain?
Reach the Pentelas region in Chapter 4 and complete the Tau-Tirkin Alliance story beat. After that, talk to Yuzet at the colony entrance to receive Lean Times in Colony Tau, which unlocks the rest of the Tau quest board as you complete each quest in sequence.
Are Colony Gamma quests missable?
Yes, the entire Colony Gamma quests chain is missable if you advance past Chapter 6 without raising Gamma affinity to rank 2. The affinity gate is hidden, so many players never realize the quests exist until they check a completion guide.
What is the fastest way to farm Nopon Coins?
Complete the Nopon quests in the City during Chapter 6, because each delivery quest rewards 3 to 5 Silver Nopon Coins for items you can buy directly from the City's Nopon Merchant. This loop takes under five minutes per cycle.
Do I need Valdi in my party for Colony 30 quests?
Yes, most Colony 30 quests after A Broken Lift require Valdi in the active party. If you remove Valdi, the quest markers disappear from the map until you add him back, which is a common source of confusion.
Can I max all colony affinity before the final boss?
Yes, but it requires clearing every one-time quest plus farming Collectopaedia Cards and Nopon quests in the late game. Focus on the City quests first, because they boost affinity for multiple colonies at once and save hours of grinding.