A vulnerability found in the Unity game engine has led to studio Obsidian Entertainment taking down five of its games, including the premium edition of its 2025 release Avowed.
The Unity issue, discovered in June and patched on October 2, could have allowed “local code execution and access to confidential information on end user devices running unity-built applications,” reads an advisory on the official Unity website. Although Unity states that there is no evidence of any impact on users, developers are still recommended to “rebuild your games and applications with updated Unity versions.”
In response to the discovery, Obsidian announced on Friday that it had temporarily removed some of its titles from digital storefronts to “implement the necessary updates” toward the security issue. Along with Avowed Premium Edition, Obsidian also removed the Grounded 2 Founders Edition and Founders Pack, Pillars of Eternity: Hero Edition and Definitive Edition, Pillars of Eternity II: Deadfire and its Ultimate Edition, and Pentiment.
A security vulnerability affecting our games that use Unity has recently been identified.
As a precaution and to keep you safe, we have temporarily removed the following titles and products from digital storefronts while we implement the necessary updates to address the issue:…
— Obsidian (@Obsidian) October 3, 2025
“Our team is working on a fix and will restore these games as soon as possible. We will provide additional information once they are available again,” Obsidian said in an X post, which also encouraged those who have the affected games installed to update them when patches become available.
Pentiment and both Pillars of Eternity games run on Unity. While Avowed and Grounded 2 run on Unreal Engine 5, Obsidian clarified on X that Unity is used for the digital artbook included with Avowed Premium Edition. Grounded 2, which is currently in early access, also includes an artbook in its Founders Pack, though Obsidian didn’t explicitly confirm if this artbook was also built in Unity.
Obsidian was far from the only studio affected by the security vulnerability, with Unity-built titles including Overcooked 2 and Among Us receiving quick patches in response to the issue, while the PC version of Fallout Shelter still remains delisted.
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