SANKYO Co., Ltd. (Headquarters: Shibuya-ku, Tokyo; President and CEO: Toshio Ogura) announces the launch of 'reVtuber Disappearance Case,' a new everyday erosion game (ARG) co-created with ARG creator SIM3, available from 7:00 PM on Wednesday, June 17, 2026.

This work is a direct sequel to SIM3’s previous ARG, 'Vtuber Disappearance Case.' Following the shocking conclusion experienced by players in the original, the story now advances into a new phase.

About 'reVtuber Disappearance Case'

©SIM3 ©6417

'reVtuber Disappearance Case' is an 'everyday erosion game' (Alternate Reality Game, or ARG) that invites players to uncover the truth of a narrative by investigating real-world websites. Players are approached by the Public Security Investigation Agency with a top-secret investigation, tasked with uncovering the truth behind the talent agency Phos and the shadowy organization operating behind it. Using hacking support tools and other in-game clues, players will analyze an e-book available on Amazon to unravel the story directly through their web browser.

Game Details: https://sim3.net/rev/

The story begins with a single classified report, Report No. 001, submitted to the Public Security Investigation Agency.

It reveals that ■■■ has been using entertainment activities as a cover to conduct systematic ■■■ and ■■■ targeting the general public.

To stop ■■■, the Public Security Investigation Agency has launched an unprecedented covert operation.

— And now.

Beneath the surface of this ongoing covert struggle, a new classified mission has been delivered directly to 'you.'

What appears on your screen is not a mere invitation — it’s a demand for investigation that refuses to allow you to remain a passive observer. Do you have the courage to peer into the abyss hidden behind the truth?

Note: This game is a sequel that assumes completion of the previous title, 'Vtuber Disappearance Case.' Players who have not experienced the original are strongly encouraged to play it first.

Original Game Start Page: https://note.com/sim/n/n9ccec3c0a871

Investigation Materials

To play this game, players must obtain the e-book 'reVtuber Disappearance Case: Overview of Covert Operation,' compiled by the Public Security Investigation Agency.

This 100+ page document contains numerous official records, allowing players to use the materials as clues to delve into the darkness of ■■■.

In addition to the essential gameplay documents, the e-book also includes a short story collection exploring the operation’s hidden background and the personal dramas of those involved, enabling players to fully immerse themselves in the game’s world before and after gameplay.

Cover: Top-secret documents, personal records redacted with black bars

Sales Page:

https://www.amazon.co.jp/dp/B0H4G7CRGM

Title:

reVtuber Disappearance Case: Overview of Covert Operation

Format:

E-book (Kindle)

Page Count:

103 pages

Price:

3,500 JPY (tax included)

Release Date:

Wednesday, June 17, 2026

Work Overview:

Title:

reVtuber Disappearance Case

Genre:

Everyday Erosion Game (ARG)

Credits:

Original Work, Scenario, Development: SIM3

Production: 6417

Production Cooperation: Lotus Corporation

Number of Players:

1 or more (cooperative play possible)

Play Time:

Approximately 4–8 hours (varies by number of players)

Recommended Hashtag:

#reVtuberDisappearanceCase

※ No game console or dedicated app is required — playable entirely via web browser.

※ This work is fictional. All characters, organizations, and names are entirely imaginary and unrelated to any real individuals, groups, or entities.

About SIM3:

'SIM3' is a creative unit that designs narrative experiences as 'perceptual storytelling' on the web.

Centered around the creator known as 'SIM-san,' the team handles planning, development, and operations in-house, crafting experiences where participants become part of the story.

Through works such as 'Vtuber Disappearance Case' and 'Considerations on Kamioka Seiko (Provisional),' SIM3 explores themes of 'mystery as perception' and 'immersive storytelling,' proposing new forms of play that connect society and narrative.

Official X Account: https://x.com/SIM3_ARG

Official Website: https://www.sim3.net/

About 6417:

'6417' is a content IP creation brand launched by SANKYO.

It focuses on crafting narrative experiences that emerge from subtle discomforts and small dramas in everyday life, developed in collaboration with diverse creators.

Actively exploring new genres such as ARGs, 6417 aims to create innovative entertainment that transcends traditional formats and categories.

Notable Content:

SIM3: 'Considerations on Kamioka Seiko (Provisional)'

Fourth Boundary: 'Kagami Special Juvenile Rehabilitation Facility,' 'Human Game Cassette'

Cosmic Magic: 'Cordelia JAZZ&COFFEE'

Team 'Main Building 3F Room 1': Murder Mystery 'One for All, All for Murderer,' 'Surely Not the Culprit'

PDF Version Available Here:

FACT BOX

  • Source: PR TIMES
  • Category: New Product