Quick answer: the 3rd exploration entry is Eternal Gate
If you are searching for the 33 Immortals compendium exploration 3rd entry, the clearest current answer is Eternal Gate. A Steam community question uses that exact missing-entry problem, while Thunder Lotus' v1.0 notes identify Eternal Gate as the World Selection destination for the Training Room. That combination makes Eternal Gate the strongest answer, but not proof that every current client tracks the entry correctly.
Do not confuse the answer with the Archive in Dark Woods. The Compendium is the place for run and discovery records; the Archive is a separate collection surface. Thunder Lotus also renamed the older Compendium mode to Journey in Beyond and added new journey entries, so older guides may use different labels for the same family of menus.
This page keeps the evidence boundary visible: Eternal Gate is the answer to check, the route below is a practical verification sequence, and a missing record may still be a tracking or version issue rather than a secret room that you have failed to find.
Check Eternal Gate from World Selection, revisit the Compendium after the interaction, and compare your client with the official update notes before trusting an old screenshot or a copied checklist.
What the 3rd Compendium exploration entry refers to
The phrase is awkward because searchers and community posts often spell the tab as exploration while Similarweb also records a typo variant, explodration. The useful boundary is not the spelling: it is the third slot in the exploration-style Compendium list that players see as unknown or incomplete.
Eternal Gate is the practical answer to test. It is a named destination in the current game context, and official v1.0 notes connect it with Training Room access through World Selection. That gives the entry a concrete place to check instead of sending players through every realm, secret chamber, or cosmetic route.
Treat the word intended as a supported answer, not as a guaranteed unlock. The community report behind this query says the entry can remain bugged or fail to register. That is why this guide does not promise a hidden chest location or invent a drop condition that is not confirmed by a first-party note.
The third entry is not automatically a fourth realm, a random cosmetic, or an Inner Fire effect. Keep Compendium records, Archive collections, Constellation progression, and relic effects as separate systems.
How to verify the entry in game
Use a short repeatable check instead of farming unrelated rooms. The goal is to confirm the menu surface, the named destination, and whether the current client records the result.
Open World Selection
Start from the menu surface that lets you choose a destination, not from a random raid route.
Select Eternal Gate
Use the named destination associated with Training Room access in the official v1.0 notes.
Complete the relevant interaction
Follow the current prompt and let the activity finish; avoid leaving during a loading or result state.
Reopen the Compendium
Check the exploration-style list again, then restart or revisit only if the entry still shows unknown.
Editorial verification flow. Menu wording and button prompts can change, so the current client remains the final authority.
Compendium, Journey in Beyond, Archive, and Eternal Gate are different surfaces
The fastest way to waste time is to treat every collection or progression menu as the same system. Use this boundary table when an older guide uses a different name.
| Surface | Purpose | What to check | Page action |
|---|---|---|---|
| Compendium / Journey in Beyond | Run, discovery, and journey records grouped by the game's current menu structure. | Look for the exploration-style list and its third slot. | Use Eternal Gate as the first verification target. |
| Archive | A separate collection in Dark Woods; official Update 5 describes saved Journeys there. | Confirm whether you are reading Archive progress or a Compendium record. | Use Archive questions as a separate FAQ, not as the third-entry answer. |
| Eternal Gate / Training Room | A named World Selection destination and a controlled place to test the relevant interaction. | Read the current prompt and return to the collection menu. | Test once, then recheck registration. |
| Map, secret chambers, and cosmetics | Exploration and reward systems that can appear nearby but are not automatically the same record. | Do not turn a community chamber route into an unsupported unlock claim. | Link to the map or cosmetics guide only when the reader needs that adjacent system. |
Why the third entry may still look locked or missing
A missing entry does not automatically mean that you missed a secret chamber. The community question behind this search cluster reports a tracking problem, and the v1.0 notes also show that Compendium-related recording behavior has received fixes and changes over time.
First check the version and menu label you are actually using. Early Access posts can call the system Compendium, later notes can call it Journey in Beyond, and a translated client may place the same surface under a different heading. Record the wording before comparing it with a guide.
If the entry remains unknown, repeat the controlled Eternal Gate check once, leave the menu normally, restart the game if the client did not save the result, and then compare the current official notes. Do not claim that a restart fixes the bug for every account; it is a low-risk diagnostic step.
Wrong menu
You may be viewing Archive or a reward list instead of the exploration-style Compendium list.
Old terminology
An Early Access guide may use Compendium while the current client labels the mode Journey in Beyond.
Tracking issue
A completed interaction can still fail to display if the current client has a registration problem. Treat that as a version-sensitive issue, not a secret requirement.
Unsupported certainty
Avoid guides that promise a fixed chest, exact reward, or universal unlock route without a current first-party source.
Sources checked
- Thunder Lotus v1.0 Update — Official source for current Compendium changes, Journey in Beyond terminology, and Eternal Gate / Training Room context.
- Thunder Lotus Early Access Update 5 — Official source for the Archive in Dark Woods and saved Journey context.
- Steam community question about the 3rd entry — Community evidence for the exact missing-entry question and the reported tracking problem; not treated as an official fix.
- Official Steam listing — First-party game context and media source.