Treasure Locations Guide

Find every Underkeep treasure location and Sturdy Chest with a clean route, achievement checklist, and fixes for missed treasure rooms.

Why Underkeep Treasure Locations Matter

You can clear The Underkeep, defeat the final boss, and still leave without the one chest that matters. Underkeep treasure locations are easy to miss when you follow the critical path and ignore the map’s side branches. If you are hunting Underkeep treasure locations for the achievement, treat the run as a search route first and a boss race second. That small mindset shift is the difference between a clean completion and another empty reward screen.

The Underkeep Discoveries achievement asks you to find and open all Sturdy Chests hidden in The Underkeep. It also feeds the larger Leave No Treasure Unfound meta for War Within delves. Missing one chest does not just cost you loot; it can leave the achievement unfinished and force a full cleanup run later.

Goal	What it requires	Why it matters
The Underkeep Discoveries	Find and open all Sturdy Chests hidden in The Underkeep	Zone-specific completion
Leave No Treasure Unfound	Find and open all Sturdy Chests hidden throughout War Within delves	Meta achievement progress
Achievement reward	25 points and the Seeker of Loot title	Account prestige and completion tracking

Treat Underkeep treasure locations as a route problem, not a luck problem. The delve gives you a map, a main path, and at least one side branch to check. If you clear the boss before sweeping those branches, you are gambling on the final room being enough. It usually is not.

Use this priority order for every run:

Confirm the achievement is the goal before you enter.
Check the side branch before you settle into the boss path.
Sweep the main rectangle instead of cutting through the center.
Verify achievement progress before you leave the delve.
Rerun immediately if the criteria still show missing Sturdy Chests.

What Counts as Treasure in The Underkeep

Sturdy Chests are the objective named in the achievement criteria. That matters because it is tempting to count any reward at the end of a run as “the treasure.” The achievement is not asking you to finish the delve, defeat a boss, or open a final cache. It is asking you to find and open all Sturdy Chests hidden in The Underkeep.

That distinction changes how you search. A boss kill is still useful, and the end-of-run reward is still worth taking, but neither one proves that you found every Sturdy Chest. If you leave the map with an unchecked branch, you can finish the run and still be missing the achievement objective.

Action or object	Counts toward The Underkeep Discoveries?	What to do
Sturdy Chest	Yes	Open every one you find
Final boss kill	Not listed in the criteria	Clear it, but search first
End-of-run reward	Not listed in the criteria	Do not use it as proof of completion
Leaving after the boss	No	Check the map for skipped branches

A clean Underkeep treasure locations run should be repeatable. You want the same checkpoints every time so you notice what you skipped. If you only remember “I cleared the delve,” you will not remember whether you checked the narrow leg, the main rectangle edges, or the entry path you rushed past.

The Key Layout Clue and Search Route

The most useful layout clue is the side leg. The Underkeep map reads as a main rectangular area with a narrow branch; the treasure room sits in that branch. If you only follow the big room and the boss path, the treasure room can blend into the map edge.

The treasure room is not always obvious from the main route. When the map looks like a simple rectangle, slow down at the junction and confirm whether you entered every branch. Do not overcomplicate this with a huge coordinate list. The layout clue is geometric: find the main rectangle, then check the little leg that branches off it.

Map feature	Search priority	Why it matters
Narrow leg off the main rectangle	1	Treasure room branch and the easiest miss
Main rectangle edges	2	Easy to skim past while fighting
Entry path branches	3	Quick backtrack before exit
Final chamber	4	Last check, not first proof

Use a two-pass method if you are unsure:

First pass: identify the main rectangle and the narrow side leg on the map.
Second pass: sweep the side leg, then hug the edges of the main rectangle.
Final check: compare your route to the map before you take the boss exit.

A clean Underkeep treasure locations run is not about speed. It is about eliminating uncertainty. If you can describe your route in one sentence — “side leg first, rectangle edges second, boss last” — you are much less likely to leave a Sturdy Chest behind.

Step-by-Step Underkeep Treasure Locations Run

A repeatable route beats a reactive one. Start with the branch that is easiest to forget, then work outward. This order keeps the treasure room from becoming an afterthought.

Step	Action	Checkpoint
1	Open the map on entry	Identify the main rectangle and narrow leg
2	Take the side leg to the treasure room	Open all Sturdy Chests in the branch
3	Sweep the main rectangle perimeter	No unchecked edge behind you
4	Clear the boss path	Do not exit yet
5	Backtrack skipped branches	Map has no unexplored legs
6	Verify achievement progress	Criteria updated before the next run

The key is to avoid treating the final chamber as the finish line. In a treasure run, the finish line is the achievement criteria. If you clear the boss and the criteria still show missing Sturdy Chests, you have a route problem, not a loot problem.

Here is how to apply that route in practice:

Before combat pulls you forward, mark the side leg mentally and plan to return to it.
Open every Sturdy Chest as soon as you find it; do not assume you will remember it later.
At every junction, ask whether the map shows an unexplored leg.
After the boss, walk back through the main rectangle instead of exiting immediately.
If the achievement is incomplete, leave and rerun with the same route rather than guessing.

Common Misses, Tracking, and Fixes

Most failed Underkeep treasure locations searches come down to a missed branch. The second most common issue is mistaking the end-of-run reward for the achievement objective. The third is assuming that a higher-tier clear guarantees a treasure room on the main path. It does not; the criteria is about opening Sturdy Chests.

Achievement Tracking Checklist

Check	Where to look	When to check
The Underkeep Discoveries criteria	Achievement panel	Before and after each run
Leave No Treasure Unfound progress	Meta achievement	After each War Within delve
Seeker of Loot reward	Achievement rewards	After all required chests are found

Track the criteria before you leave the delve. If it is incomplete, do not start another full clear from memory. Go back to the side leg first, then sweep the main rectangle edges. The achievement tracks Underkeep treasure locations through the chests you open, so your route should always end with a criteria check.

Troubleshooting Table

Symptom	Likely cause	Fix
Boss dead, no treasure	Side leg skipped	Return to the narrow branch off the main rectangle
Tier 6 clear, no chest	End reward mistaken for the objective	Check the map for unopened Sturdy Chests
Achievement still incomplete	At least one Sturdy Chest missed	Rerun and open every Sturdy Chest on the route
Map feels fully explored	Narrow branch overlooked	Walk the junctions and check map geometry
Repeated empty finishes	Route is boss-first every time	Switch to side-leg-first, then perimeter sweep

If your Underkeep treasure locations search failed after a full clear, do not assume the run is broken. The simpler explanation is usually a missed branch. Re-enter, go straight to the side leg, then sweep the main rectangle edges. If the achievement is still incomplete, repeat with the checklist and open every Sturdy Chest rather than only the ones near the boss.

FAQ

Where are the Underkeep treasure locations?

The key known location is the treasure room in the narrow leg that branches off the main rectangular area. Sweep that branch first, then check the main rectangle edges and any entry-path branch you skipped. Exact pinned coordinates are less reliable than reading the map’s shape.

Do I need every Sturdy Chest for The Underkeep Discoveries?

Yes. The achievement criteria is to find and open all Sturdy Chests hidden in The Underkeep. A boss kill or end-of-run reward does not replace a missed Sturdy Chest, so check the achievement panel before you leave.

Why did I get no treasure after completing Underkeep at tier 6?

Completion and treasure collection are separate goals. A tier 6 clear can still leave you without the chest if you skipped the side branch. Check the narrow leg off the main rectangle, then verify whether any Sturdy Chests remain unopened.

Is there a shortcut for Underkeep treasure locations?

There is no reliable shortcut around the search itself. The fastest safe method is to identify the side leg on entry, clear it, then sweep the main rectangle on the way to the boss. Backtracking at the end costs more time than checking the branch early.