Human Farm Investigation Version History and Patch Notes
Launch timeline, RP26071196, and how to confirm your Steam build.
Why track versions
Human Farm : Investigation : received a same-week publisher patch after Steam launch. Walkthrough flag timing, gallery presentation, and warning text can differ between unpatched depots and installs with RP26071196 applied. This page chronicles verified release milestones so you can match forum advice and wiki guides to your build.
Developer とっくり海月 and publisher 072 Project ship the game on Steam app 3953160 with companion demo app 4629570 (Day 1 only).
Release timeline
| Date | Milestone |
|---|---|
| August 7, 2026 | Full game launches on Steam (app 3953160) |
| August 7, 2026 (launch window) | Steam introductory offer begins — ends approximately August 21, 2026 |
| August 7, 2026 | Free demo (app 4629570) available — Day 1 content only |
| Post-launch | Official patch RP26071196 published on 072 Project regional shops |
| 26/08/07 (publisher date) | RP26071196 update note — recall-room warning text revised |
Exact Steam build IDs rotate with depot updates — use the check method below rather than memorizing numbers.
Launch build (1.0 window)
The August 7 release includes:
- Full undercover campaign with Iori as protagonist
- Thirty-four story events and five or more endings
- City quests, cafe hub, underground farm — Story Overview
- Scene gallery unlocker and action cheats — unlocker does not unlock endings — Cheats and Unlockers
- Default Steam-cut asset presentation without manual patch
Launch-week reports noted occasional event errors and presentation gaps versus publisher international builds — motivating RP26071196.
Patch RP26071196 (official free patch)
072 Project distributes RP26071196 as a free download from official regional shop pages (example CN path: the official 072 Project shop page for RP26071196 — other regions mirror the product ID). Treat only 072 Project hosts as authoritative — Official Patch.
What RP26071196 includes
- Bugfixes for event errors reported on early Steam builds
- Restore / additional patch assets for the Steam depot — uncensored or omitted CG restoration per publisher readme
- ~500 MB archive size when downloaded
- Cannot run alone — requires base game files already installed via Steam
- Folder copy install — extract archive, copy contents into the Steam game directory (Library → Gear → Manage → Browse local files), overwrite when prompted — Patch Install Helper
26/08/07 update note
Publisher changelog for RP26071196 documents an updated recall-room warning text on 26/08/07. Players sensitive to intense content should notice clearer in-fiction warnings before recall-room sequences — details in Content Warnings.
Re-download RP26071196 if your local archive predates this note and warning text still looks outdated.
Introductory offer (~Aug 21)
Steam listed a time-limited introductory price around launch, ending approximately August 21, 2026. Pricing is store-managed — confirm current tags on the Steam page before purchase — Should You Buy.
Wiki guides do not depend on sale timing; patch RP26071196 remains free regardless of price paid.
Demo versioning
Demo app 4629570 tracks separately from the full game:
- Day 1 only — no carry-over saves — Demo Day 1
- Not patchable with RP26071196 — patch targets paid install folder
- Useful for control tutorial — arrows, Z/Enter, X/Esc, run mode — Keyboard Controls
How to check your Steam build
- Open Steam → Library → Human Farm : Investigation :
- Right-click → Properties → Updates (or Installed Files on newer clients)
- Note Build ID or last updated timestamp
- Compare against community posts that cite patch state (patched vs vanilla Steam cut)
Optional: after RP26071196 install, spot-check gallery entry count against Scene Checklist on a save with known flags.
Steam verify integrity interaction
Running Verify integrity of game files restores Valve depot defaults and may remove RP26071196 file overwrites. Reapply patch after verification — document this when sharing advice — Common Issues.
Series context
Investigation is the third numbered Human Farm entry after Rehabilitation and Practice Section, with related 潜入編 (infiltration) positioning in series marketing — Series Comparison. Version history here applies only to Investigation app 3953160 unless clearly noted.
Future updates
When 072 Project or Steam ships additional patches:
- Note build ID and patch product code
- Update this page’s timeline table
- Re-run True Ending Checklist if flag timing changes are confirmed
Fan wiki is not an official changelog mirror — cross-check Steam news and 072 Project announcements.
Related pages
- Official Patch — full RP26071196 guide
- System Requirements — disk space for patch
- Content Warnings — recall-room warning context
- Patch Install Helper — step checklist
- Common Issues — verify integrity and mouse door fixes
Knowing your version prevents wasted hours chasing scenes that were bugged on launch builds or hidden behind Steam-cut assets restored only in RP26071196.
Frequently Asked Questions
Quick answers to the most common questions.
What is patch RP26071196?
Official free 072 Project patch — bugfixes, restored assets, ~500 MB folder copy install.
When did the game launch?
August 7, 2026 on Steam app 3953160.
When does the intro offer end?
Approximately August 21, 2026 — confirm on Steam.
What changed on 26/08/07?
Recall-room warning text update in RP26071196 notes.
How do I know if patch applied?
Gallery/visual spot-check plus install steps in [Patch Install Helper](/tools/patch-install-helper/).