HoYoverse BSide: Olivia Lin — Shut Down After 28 Days (Aug 2026)

Published · Researched 2026-09-20

Overview

BSide: Olivia Lin was HoYoverse/miHoYo's experimental AI companion application — a desktop companion centered on Lin Li, a Shanghai university student (piano major, psychology minor) who interacted with users through piano performances, AI-generated letters, and a dynamic desktop wallpaper. It launched in Early Access on Steam China on July 13, 2026, earned a Very Positive Steam rating — and then HoYoverse ended online operations after just 28 days of service, one of the shortest commercial lifespans of any AI companion product on record. This file resolves the previously single-disputed "HoYoverse AI-girlfriend shutdown" lead: VERIFIED via three independent press sources (enduins.com, TMTPost, Inven Global, all Aug 2026).

Timeline:

• July 13, 2026 — BSide: Olivia Lin enters Early Access on the China Steam store (TMTPost).
• ~August 10–11, 2026 — miHoYo announces the end of online operations, less than a month after launch. The announcement lands days after China's July 15, 2026 AI-companion regulations took effect — timing that invites the regulatory reading, though miHoYo's notice cites "product roadmap and future plans," not compliance.
• August 27, 2026, 15:00 (Shanghai time) — Offline version released: preserves Olivia's piano performances and the dynamic desktop wallpaper locally. Online features (letter writing, MIDI uploading to generate music videos) discontinued the same day.
• August 31, 2026, 15:00 — Title removed from the Steam shop; servers shut down completely. Players had to download the offline build before the cutoff and back up letters, MIDI files, and library data — all online letter history and user data deleted once servers closed (enduins.com).
• Sept 2026 — Offline version is the only surviving form; no online service remains.

Related, single-source: TMTPost reports that the short-lived experiment "follows the permanent closure in late July of AnuNeko, an AI cat-girl companion from Anuttacon, the studio founded by miHoYo co-founder Cai Haoyu." AnuNeko (anuneko.com) is independently confirmed as Cai Haoyu's AI chat product with a strong catgirl personality system (V2EX thread, ~Dec 2025, with a reconstructed system prompt showing "normal/healing mode" vs "sassy defense mode" personas). The late-July-2026 closure date and the circumstances rest on the single TMTPost mention — treat as partially UNVERIFIED.

Social standing

Where people talk about it: gaming press (Inven Global's translated Steam notice, TMTPost, enduins.com) and Chinese-language forums (V2EX thread on AnuNeko's personality design). No large English-language grief community was observed — the product lived 28 days, on Steam China only, which limited the mourning surface. The Steam "Very Positive" rating is the clearest sentiment signal: users who tried it liked it.

Consensus verdict: a genuinely liked experiment killed with startling speed — either a ruthless product-roadmap cull or a quiet casualty of the July 15, 2026 regulatory wave (or both). The offline-version farewell is the graceful exception in this research set: most dead companions take everything with them; HoYoverse at least left the piano playing.

Key social/press moments:

• miHoYo's Steam termination notice (translated by Inven Global, Aug 2026): "Although it has not been long since we began Early Access on July 13, 2026, we have met many of you who wished to get closer to Olivia Lin. The vinyl records we listened to together, the letters we wrote, and the melodies we uploaded are all memories that truly existed."
• enduins.com (Aug 2026): "HoYoverse has announced the shutdown of its experimental AI companion application, BSide: Olivia Lin… ending online operations after just 28 days of service."
• TMTPost: notes the app "faced criticism from some players who felt the interaction model was too simple compared to existing companion tools" despite the Very Positive rating.
• V2EX (Dec 2025) on AnuNeko: users dissecting and reconstructing its dual-personality system prompt — evidence of a real enthusiast community around Cai Haoyu's catgirl bot before its closure.

Main praise (from press/Steam):

• Very Positive Steam rating in its 28-day window.
• The farewell itself: an offline version preserving core features is the most user-respecting shutdown in this research set.
• Concept charm: piano performances + AI letters + desktop wallpaper was a distinctive, non-girlfriend-framed companion design.

Main complaints / failure modes:

• 28-day lifespan — the headline fact; users barely had time to form the attachments the product was designed to create.
• Thin interaction model — criticized as too simple next to existing companion tools (TMTPost).
• Total online data deletion — letters and histories wiped at server shutdown; only users who downloaded the offline build in the 4-day window kept anything.
• Regulatory shadow — launched 2 days before China's companion rules took effect; whether the shutdown was compliance-driven is UNVERIFIED, but the timing is conspicuous.

Representative quotes:

• "The vinyl records we listened to together, the letters we wrote, and the melodies we uploaded are all memories that truly existed." — miHoYo's official Steam termination notice (via Inven Global translation, Aug 2026) [brand content: official statement]
• "To bid a proper farewell to this journey, we have prepared an offline version so that Olivia Lin can still remain by our side." — same notice [brand content]

No verbatim end-user grief quotes were found in observed sources; the record is press + the official notice. Honest reporting: none found.

Key specs

Pricing

Steam Early Access pricing was not captured in any observed source — UNVERIFIED. The offline version was released as a free update to existing owners before delisting (per the termination notice schedule).

Support reality

• Official support: the termination notice itself was the communication; a 4-day download window (Aug 27–31) for the offline build, with explicit instructions to back up letters/MIDI/library data.
• Community support: thin — gaming press and forum threads; no large dedicated community observed.
• Data portability: none beyond the manual backup window; all online letter history deleted at server shutdown.

Community verdict

BSide is the mayfly of AI companions: loved in its 28 days (Very Positive on Steam), gone before attachments could calcify into grief. The offline farewell is the class act of the shutdown genre — HoYoverse understood that even a 28-day companion deserves a goodbye that leaves something behind. The unanswered question is whether the July 15 regulations killed it; miHoYo will only say "product roadmap." Either way, the lesson is about experimentation ethics: if you're going to sell companionship as a trial, a 28-day trial that ends in server deletion is a strange kind of product.

Sources & images

• Sources: enduins.com/news/hoyoverse-shuts-down-ai-companion-app-bside-olivia-lin-after-28-days (Aug 2026); en.tmtpost.com/news/8099694; invenglobal.com/articles/24678 (Steam notice translation); v2ex.com/t/1179363 (AnuNeko thread).
• Images (../images/): hoyoverse-bside-01.jpg (primary), -02.jpg, -03.jpg — see Images section below.

UNVERIFIED: Steam Early Access price; whether Olivia Lin is real-time 3D; whether the July 15, 2026 regulations caused the shutdown; AnuNeko's exact closure date and circumstances (single-source).