"Guilty Gear" developer Arc System Works reports cyberattack and data leak

Japanese video game developer and publisher Arc System Works, known for popular fighting game franchises like “Guilty Gear” and “BlazBlue,” has announced that it has fallen victim to a cyberattack.

The company reported that an unauthorized third party gained access to its systems, leading to a data breach and the potential leakage of internal data.

According to a statement released by Arc System Works on May 14th, 2025, the company is currently investigating the extent of the breach and working with external experts to determine the cause and impact.

Arc Systems Works — At this stage, it is thought that user data was not compromised during the breach

At this time, Arc System Works has stated that there is no confirmation of user personal information or player account data being compromised. However, they have pledged to provide updates should any new information come to light during their ongoing investigation.

While the company’s official statement does not specify the nature of the leaked data, recent reports circulating on social media suggest a possible connection to a significant leak of source code for an unreleased title from Arc System Works.

These unofficial reports claim that a substantial amount of development data, potentially including source code, assets, and even information about unannounced content, has been made public.

Arc System Works has urged users to exercise extreme caution and to refrain from accessing any potentially leaked data, as it may contain malware or other harmful software. The company has not yet confirmed if the widely reported source code leak is directly related to this acknowledged data breach.

Arc Systems Works 3 — Further comment from the developer can be expected in due course once they have fully investigated the breach

This incident comes at a sensitive time for Arc System Works, as fans eagerly anticipate announcements and releases for their various game series.

The potential leak of sensitive development information could have significant implications for the company’s future plans and the integrity of its upcoming titles.

The investigation into the data breach is ongoing, with Arc System Works expected to comment further regarding the extent of the damage and any potential impact on their games and users once more information is available.

Source: Arc System Works

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