The currently available reference list for The Sinking City 2 includes Dialogue Testing Case, Ex Oblivione, Haunted Mansion, and The Hidden Temple, but the game is structured around survival-horror chapters and objectives rather than a fully verified traditional case-book order.
The Sinking City 2 keeps its investigative flavor within a combat-centered survival-horror journey through Arkham. This index helps separate named investigation threads from chapter objectives, evidence, documents, and collectibles.
Quick answer
Use the four names as lookup points when a matching label appears in the game. Your active story objective indicates where to progress, while the Investigation tab helps organize related clues and evidence.
At a glance comparison
| Case or investigation | Use |
|---|---|
| Dialogue Testing Case | Match the exact label to related clues, journals, puzzles, and Investigation-tab links. |
| Ex Oblivione | Track Ex Oblivione documents and the lore they reveal across story areas. |
| Haunted Mansion | Keep clues and puzzle observations associated with this named investigation together. |
| The Hidden Temple | Use the name as a lookup point for its investigation trail and connected discoveries. |
Check the label shown in the game before assigning something to an entry. A chapter objective, collectible document, and optional investigation can appear in the same area without representing the same kind of activity.
How to use this list
Let the active objective establish your main route, then investigate beyond that route according to your priorities. Documents, clues, ritual residues, puzzles, and optional spaces can support an investigation even when they are not required for the objective currently on-screen.
| Player goal | Best use |
|---|---|
| Story-first | Follow chapter objectives and consult the index when one of its named entries appears. |
| Completionist | Search the current area for clues, journals, ritual residues, puzzles, and secrets before advancing. |
| Survival-focused | Prioritize available investigations that may provide supplies, safer routes, or upgrades. |
| Lore-focused | Read documents carefully and connect related evidence through the Investigation tab. |
Keep investigation progress separate from collectible tracking. In particular, Evidence pages and Ex Oblivione documents can sit alongside other collectibles, so read their labels before deciding that an investigation thread is finished.
Make a manual save before leaving an investigation area so you can return for missed clues, puzzles, collectibles, or achievement progress.
Complete reference
The names below form the supplied reference set. A name by itself does not determine an exact location, route, reward, or final chronological position, so pair each entry with the objectives and investigation information displayed during your playthrough.
| Entry | Notes |
|---|---|
| Dialogue Testing Case | A distinct case label for organizing its related investigation material. |
| Ex Oblivione | A document and lore thread extending across story areas. |
| Haunted Mansion | A named investigation to track separately from chapter progression. |
| The Hidden Temple | A named investigation with its own trail of discoveries. |
Dialogue Testing Case
Keep Dialogue Testing Case as a separate reference entry whenever its label appears. Group connected clues, journal passages, puzzle observations, and Investigation-tab links beneath it instead of automatically folding them into the current chapter.
Ex Oblivione
Ex Oblivione is tied to documents found across story areas. Use this entry to track those documents and assemble their lore connections while keeping the collection thread distinct from mandatory objectives and unrelated Evidence pages.
Haunted Mansion
Use Haunted Mansion as its own investigation heading when you encounter the name. Keep its clues and puzzle observations together, then connect the associated evidence through the Investigation tab where the game permits it.
The Hidden Temple
Track The Hidden Temple independently until the game connects it to another objective. File relevant clues, journals, ritual residues, secrets, and puzzle discoveries under this label to avoid mixing its trail with nearby story activity.
What counts as a case or investigation in The Sinking City 2
The Sinking City 2 is a third-person survival-horror game rather than a pure detective simulation. Chapters and objectives drive main progression, while investigations add mysteries and reasons to explore beyond the direct story route.
Investigative activity includes reading ritual residues, examining grisly clues, decoding strange journals, linking evidence, solving puzzles, and uncovering secrets. Not every individual document or puzzle is a standalone case; several discoveries can contribute to one broader thread through the Investigation tab.
This investigation layer also supports the survival loop. Exploring an optional mystery can reveal alternate options or help prepare you for later encounters, making observation and evidence work useful even when the immediate objective points elsewhere.
Investigation and objective icons
These visuals come from the in-game assets for The Sinking City 2. They are included as a practical identification reference for the names and entries in this guide.
Frequently Asked Questions
Does The Sinking City 2 use traditional cases like the first game?
Not in the same form. The sequel places its investigative systems inside a chapter- and objective-led survival-horror structure, so a major objective does not necessarily correspond to a separate case-book entry.
Are optional investigations required to finish the story?
No. Optional cases never gate story progress, so you can return to the active objective without clearing every available mystery.
Should I clear an investigation immediately or return later?
Clear it when your route naturally passes through the area and you have enough ammunition and healing resources to explore safely. If encounters become too costly, retreat to a refuge, rearm, adjust your build, and return later.
Can I use this list without major spoilers?
Yes. The index names each entry without revealing story outcomes or puzzle solutions, and the disclosure panels let you open only the notes you need.
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