In Falsus, Arcaea Developer lowiro's Rhythm Adventure, Launches on Steam
The release is lowiro's second title after Arcaea, and the sources frame it as a different genre, with the Game Spark play report describing a loop where story progression, song unlocks, and card crafting feed each other.
Key Facts
- In Falsus launched on Steam on September 9, 2026, developed by lowiro, the studio behind Arcaea.
- The game includes more than 70 songs at launch, with over 40 original tracks written for In Falsus.
- In Falsus uses a control scheme that combines six keyboard keys with mouse movement for notes on two lanes.
- The story follows five female high school students in a world where collars expose lies and emotions.
- lowiro will exhibit In Falsus at Tokyo Game Show 2026, held September 17 to 21 at Makuhari Messe.
Reporting from 3 sources: 4Gamer.net, Denfaminicogamer, Game Spark.
lowiro, the developer behind the rhythm game Arcaea, released In Falsus on Steam on September 9, 2026. The rhythm adventure game combines a keyboard and mouse control scheme with a full-voice visual novel story and card crafting. Players use one hand on six keys (Shift, A, S, D, F, Space by default) to hit notes on the lower lane while the other hand moves the mouse to handle notes on the upper lane. The game is set in a near-future world where everyone wears a collar that reveals emotions and exposes lies. Five female high school students, each with their own problems, are forced to join a mysterious organization. The story follows each girl's perspective through selectable routes. At launch the game includes more than 70 songs, over 40 of them original tracks written for the game. Composers include REDALiCE, USAO, and Camellia. lowiro also announced the game will be playable at Tokyo Game Show 2026, which runs September 17 to 21 at Makuhari Messe.
In Falsus follows five protagonists: Nia Keena (voiced by Fuuka Izumi), Mei Alder (Ran Hanabana), Takatsuki Ayame (Kanon Amaki), Iris Reel (Ayame Fujikami), and Story Etienne (Miri Saito). Each girl has her own route, and the story is told through per-character timelines that show the same events from different angles. The world's citizens are required to wear collars called Bind that change color with emotional swings and emit noise when the wearer lies.
The rhythm section offers four difficulty tiers: MINIMAL uses up to four keys, EVOLVED five, ULTIMATE the full six lanes, and FORBIDDEN adds notes that span multiple lanes. Higher difficulties unlock progressively as the player clears charts. The card system lets players craft cards from blueprints using particles arranged on a hex grid, and cards carry attack and defense values plus five attributes, with a 1.25x stat bonus when matching an enemy's weakness. Winning encounters unlocks songs. A free mode lets players play unlocked songs without failure penalties, though rewards require meeting normal clear conditions.
lowiro will also show In Falsus alongside Arcaea at Tokyo Game Show 2026, September 17 to 21 at Makuhari Messe. A demo is available on Steam.
Synthesized by Yomimono from the 3 cited sources below, including Japanese-language reporting where cited, then editorially reviewed before publishing.