Staffer Case: A Supernatural Mystery Adventure
Released Apr 2023
Staffer Case is a new sort of mystery game, asking players to find clues, arrange them into documents, and point out the contradictions between them to solve a series of murders. Each mystery unraveled leads you closer to the truth lying at the heart of each case!
93% positive · 4,375 reviews
Done
All announced content has been released
Medium confidence
Done
All announced content has been released
Medium confidence
Where to buy
Steam $16.99
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Evaluation
Staffer Case: A Supernatural Mystery Adventure launched on April 30, 2023 as a complete mystery adventure game. Its only DLC — a digital artbook — released on June 30, 2023. The game received its most substantial post-launch update on October 8, 2025 (v3.0.0), which added full Japanese voice acting, significant UI improvements, and upgraded background artwork. No further content announcements for Staffer Case itself have been made since that date.
Team Tetrapod has continued to be very active as a studio, but that activity has been focused on other entries in the STAFFER series: Dice Eater (a spin-off that launched July 1, 2025) and Staffer Retro: A Supernatural Mystery Quest (which released on Steam on July 22, 2026). The developer's news posts from late 2025 through 2026 are about these other titles, not about new content for Staffer Case. The July 22, 2026 post announcing Staffer Retro's launch is the most recent communication from the developer, and it contains no mention of further updates or content for Staffer Case.
The game launched as a self-contained mystery adventure, all announced content has shipped, and the developer has directed its development efforts toward new series entries rather than ongoing additions to this title. October 8, 2025 — the date of the v3.0.0 update — represents the most reasonable completion point for Staffer Case's content.
Evidence
v3.0.0 update shipped, adding full Japanese voice acting, UI improvements, and upgraded backgrounds — the most substantial post-launch update to Staffer Case. No further Staffer Case content has been announced since.
Team Tetrapod's most recent communication announces the launch of Staffer Retro, a new series entry. No mention of further updates or content for Staffer Case.
Content
1 of 1 released · no outstanding content
Media
Details
Developer
Publisher
Team Tetrapod
Achievements
10
Platform
Windows, macOS
Controller
full support
Steam Deck
Verified
Players
Single-player
About this game
Play Cases 1 & 2 for free today!
Streaming allowed for all cases in the main game!

Staffer Case is a new sort of mystery game, asking players to find clues, arrange them into documents, and point out the contradictions between them to solve a series of murders.
The game is set in a fictional version of London in the 1960s where 10% of all residents have some sort of supernatural ability. In this city, incidents involving staffers, the people who have these abilities, are constantly occurring.
Players take the role of the Mana Affairs Division's newest detective, Notrick, in order to make sense of these incidents. Since the tricks buried within these staffer cases, at their core, revolve around the supernatural abilities of these criminals, conventional investigative methods won't be enough to solve them. Instead, players will have to rely on the documents that explain what their suspects' abilities entail in order to make sense of everything.

Fortunately, it's not only the criminals who have these supernatural abilities.
All of Notrick's fellow detectives at the Mana Affairs Division are also staffers (Excepting gumshoe Notrick himself, of course!). The senior detectives use their supernatural abilities to investigate the crime scenes and organize their findings into documents.
Testimonies that account for emotional distress, invisible trace that tells when evidence was left, even memories that remain in objects—find contradictions using the various clues at your disposal!
Each mystery unraveled leads you closer to the truth lying at the heart of each case!

Solve five cases involving supernatural powers!
Play through two substories that delve into the characters' backstories and personalities!

[Case 1 : Backstage]
Notrick, an assistant from a small town detective agency, receives a letter from the Pheno-mana Bureau and heads off to London.

[Case 2 : Pet Shop]
Creechers: the mutated results of Pheno-mana.
An incident occurs at a creecher breeding facility.

[Case 3 : The Wizard's Room]
Staff: tools that exist with mysterious powers.
The body of a famous staff collector was found sliced in half, vertically.

[Case 4 : Mistletoe]
Oppenheimer: the threat level applied to Pheno-mana as dangerous as atomic bombs.
In the basement of the Bureau lies a facility that houses these Oppenheimers.
[Case 5 : ???]
Present events, past events, and the truth that lies beyond...
[Game Streaming Guide]
Staffer Case is free to stream, regardless of length of stream, as long as the contents don't include the following:- Modifying the game code or doctoring of the game contents through reverse engineering, hacking, or other means.
- Plans to undermine the story of the game by distorting the main storyline or using broadcasting centered around gore or adult themes.
- Claiming to be an officially sanctioned stream without prior consultation with the dev team.
The following content is not mandatory to include, but would be greatly appreciated:
- We would be grateful if you could let us know your plans to stream on our official Discord channel.
- If you could introduce the game information or URL in the introduction of your broadcast, that would be of great help to our team.
- Official SNS hashtag is #StafferSeries #StafferCase
Last evaluated Oct 8, 2026
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