鋼鉄戦記C21

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C21 Steel Battle Chronicles is an Action MMORPG in which you can customize your very own robot to determine how it fights in battle. Become a member of the Neo Angel Force and defeat the nefarious Demon Force to restore peace to the Cosmic Renaissance!

Developer: CyberStep, Inc.
Released: 15 Oct 2020 (2006)
Price: Free to play
Platforms
Steam Deck: Unsupported
Languages: Japanese
Series: Cosmic

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Public builds

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Counted once we have watched for 90 days (since 21 Oct 2026)

Last 90 days · as of 24 Oct, 21:56 UTC

How this is measured

Distinct builds deployed to a game's public (default) Steam branch, as Steam's client network describes them.

Checked within minutes of each Steam change. Observed since 21 Oct 2026.

We see a game's builds only from the day we started watching it. Before that we know just the build it was on, so counts over a window are shown only for games watched for the whole window.
A build is not necessarily a content update: developers also ship fixes, and some builds change only files players never see.

Source: Steam client network (PICS), App info, public branch. Full methodology

Latest public build

7 Sept 2020, 03:08 UTC

Build 5472570

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Public Builds

Public builds of 鋼鉄戦記C21, newest first
Build	Went live	After the one before	Patch notes
5472570	7 Sept 2020, 03:08 UTC	—	None posted

From Steam’s client network, last checked 24 Oct, 21:56 UTC. Builds before 21 Oct 2026, when we started watching, aren't listed. Patch notes are the developer’s post tagged as patch notes from an hour before to a day after the build. Not every build gets one. How we count

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