Kodansha Game Lab Opens Steam Page for Legacy Code
The pitch rests less on the parts-collection loop than on the Marionette Engine's promise that any configuration of junk will still move, which makes the studio's inability to predict the result a design choice rather than a bug.
Key Facts
- Kodansha Game Lab opened the Steam store page for Legacy Code on September 16, 2026.
- Legacy Code is scheduled for release on PC via Steam in 2027, with pricing undecided.
- Legacy Code is developed by indie creator Room 127 and is described as the studio's first title to be released.
- Legacy Code was selected as one of eight finalists for Sense of Wonder Night 2026, chosen from more than 1,500 submissions.
- The game's Marionette Engine moves a Mechanimal no matter how its parts are combined, and the result can be unpredictable.
Reporting from 3 sources: Denfaminicogamer, Automaton, Game Spark.
Kodansha Game Lab opened the Steam store page for Legacy Code on September 16 and started accepting wishlist registrations. The physics simulation game is developed by indie creator Room 127 and is scheduled for release on PC in 2027. Players combine junk parts, including doll heads, electric fans, televisions, 3D puzzles, dentures, chains, and cacti, into creatures called Mechanimals, then operate them directly. Defeating enemies yields the parts they carried, and adding those parts changes both appearance and performance. Each part has its own movement quirks, and no clear correct answer exists for assembly. The game runs on the Marionette Engine, an in-house physics system built by Room 127 that moves a Mechanimal regardless of how its parts are combined, though the result sometimes walks in ways its own creator did not intend. The cycle of build, fight, and collect expands the walkable world, from deserts to snowy mountains and ruins. Legacy Code supports Japanese, English, and Simplified Chinese, with pricing undecided.
Room 127 is the game development division of Keiritsu Inc. The studio's earlier work was on systems that assemble living creatures from parts and creatures that move through procedural animation. Legacy Code has been selected as one of eight finalists for Sense of Wonder Night 2026, an indie game contest held inside Tokyo Game Show 2026 at Makuhari Messe International Conference Hall on September 17, 2026.
- The contest drew more than 1,500 submissions from around the world through the Tokyo Game Show 2026 indie call for entries.
- Room 127 will give a presentation on the day of the event.
- The game has an X account at https://x.com/room_127_lc.
- Development is by Room 127, with publishing by Kodansha Ltd.
- The player count is one.
Legacy Code was previously known as "Legacy Code (tentative)" and was selected in February 2023 as a lab member of Game Creators Lab Audition Vol. 2. At that time it was introduced as a battle simulation and tower defense game. It now heads to Steam as Room 127's first title to be released.
Synthesized by Yomimono from the 3 cited sources below, including Japanese-language reporting where cited, then editorially reviewed before publishing.