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In Falsus Patch Notes & Update Tracker

Every official In Falsus update in one place: the demo v0.2.0–v0.3.1 history, the September 9, 2026 launch build, and each post-launch patch lowiro announces — sourced and dated.

Sep 9, 2026infalsus.orginfalsus.org

In Falsus launched on September 9, 2026 — and this page is our permanent tracker for everything lowiro publishes from here on: launch announcements, patch notes, hotfixes and event news. Every entry carries its date and an official source. No leaks, no datamined rumors — if lowiro didn't say it, it doesn't go in the changelog.

Sources we track

Changelog

v1.0.5 — September 30, 2026

Version 1.0.5 went live on September 30, 2026 and shipped In Falsus' first paid song pack:

  • New Virtual Singers Song Pack DLC ($5.99 US, Steam appid 5256550): "Monitoring" (DECO*27), "Non-breath oblige" (PinocchioP), "Roki" (mikitoP), "Lost One's Weeping" (Neru) and "Apparently there's a cheat code to happiness" (UtataP), with a −10% game-plus-pack bundle discount for a limited time. All five tracks — four chart levels and note counts each, topping out at Roki's FBD 13 — are already in our song catalog.
  • Fixes to charts F0 CHA0S and an Arc 4 song (Outer Justice) which were using incorrect versions of the charts
  • Fixes for incorrect display of Loadout calculations
  • Fixes to sorting of songs in some conditions
  • Clarified conditions required to complete Mastery Challenges
  • Various minor fixes to Scenario text
  • Minor fixes to Timeline visuals
  • Settings text fixes

Two notes for our own data: our F0 CHA0S guide was captured before this patch, so the 20-judgement gap between its result card and the catalog split belongs to the pre-1.0.5 chart — and the encounter simulator keeps pre-1.0.5 values until charts are re-verified in game, same policy as v1.0.4.

Source: "In Falsus v1.0.5 Patch Notes" — Steam News, September 30, 2026 and "Virtual Singers — The First Song Pack for In Falsus is Out Now!" — Steam News, September 30, 2026. Verified October 1, 2026.

v1.0.4 — September 18, 2026

Version 1.0.4 is now available. Official patch notes:

  • Changed the default audio buffer size selection
  • Reduced the difficulty of certain encounters in later arcs that were incorrectly more difficult than intended
  • Fixed the list of selectable audio buffer sizes
  • Fixed SFX playing while a button is disabled
  • Fixed the displayed Mastery challenge threshold of certain Recipes
  • Fixed the pinned Mastery Challenge display getting stuck
  • Fixed a missed song unlock notification for certain songs
  • Fixed the Song Pack completion badge not showing correctly
  • Fixed Results scene label assignments for encounter results
  • Fixed various button hit boxes
  • Fixed recipe scene navigation sometimes taking you to the Inventory incorrectly
  • Minor adjustments to certain scenario scene character outfits and background art
  • Minor adjustments to Japanese and Chinese scenario text

The encounter change is the one our tools care about: until we re-verify charts in game on v1.0.4, the encounter simulator keeps the values we verified on earlier builds — keep that in mind for exact cross-version comparisons.

Source: "In Falsus v1.0.4 Patch Notes" — Steam News, September 18, 2026. Verified September 19, 2026.

v1.0.3 — September 11, 2026 (first post-launch patch)

Version 1.0.3 is now available. Official patch notes:

  • Fixed issue where Iris in certain scenario scene had incorrect outfit
  • Fixed issue on startup which could cause audio devices to fail to load
  • Fixed issue where encounter label assets can show overlapping
  • Fixed issues causing certain Scenario, Crafting Tutorial, and Hand Select situations causing a soft-lock
  • Minor adjustments to Chinese scenario translation
  • Adjusted threshold for certain Crafting mastery challenge

Dev comments: lowiro thanks everyone playing In Falsus and says more fixes will keep shipping in the coming days.

Source: "In Falsus v1.0.3 Patch Notes & Dev Comments" — Steam News, September 11, 2026. Verified September 15, 2026.

Full release — September 9, 2026 (08:00 UTC)

  • In Falsus launched on Steam for PC, Windows-only, at $39.99 with a −10% launch discount (regional prices vary)
  • Launch content: 70+ songs (40+ originals) at chart levels 1–11, a full-length ADV scenario fully voiced in Japanese, and the Card Crafting system
  • 25 Steam achievements, Steam Cloud saves, Family Sharing
  • The free demo was removed from Steam the same day, as announced on August 31
  • Up next: playable at Tokyo Game Show 2026 (September 17–21, Hall 3-C01), per the September 3 announcement

Source: "In Falsus Out Now on Steam!" — Steam News, September 9, 2026. Verified September 9, 2026.

Launch day shipped with no day-one patch — the first post-launch patch is the v1.0.3 entry above (September 11, 2026), and every official update after it will keep being tracked on this page.

Demo era — February to September 2026 (historical)

The demo ran from February 11, 2026 until launch day, and its final build was v0.3.1. The demo has been removed from Steam; this history stays for reference, and our demo guide archives what each build contained.

| Version | Date | Highlights | | ------- | ------------ | -------------------------------------------------------------------------------------- | | v0.2.0 | Feb 11, 2026 | Demo launch: 5 songs, first Scenario scenes — joined Steam Next Fest | | v0.2.1 | Feb 13, 2026 | Bugfixes, dev comments on feedback | | v0.2.2 | Feb 20, 2026 | Further fixes during Next Fest | | v0.3.0 | Apr 22, 2026 | Card Integration system, new song Deep Into The Vibe // rejection, Mei and Iris scenes | | v0.3.1 | pre-launch | Bugfix patch on top of v0.3.0 — the final demo build (no separate date announced) | | — | Sep 9, 2026 | Demo removed from Steam at full-release launch |

Sources: Steam News announcements (February–April 2026) and the August 31 delisting notice. Verified September 9, 2026.

Before you report a bug

Most launch-week issues are environment problems with known fixes: our black screen fix guide, keys not registering guide and system requirements breakdown cover the common ones. If it is genuinely a game bug, the Steam Discussion forums are the right place — lowiro's devs have read them since the demo days.

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