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A Japanese indie developer, Shiromofu Factory, launched the game Dungeon Antiqua on October 10, 2024. The game, inspired by early Final Fantasy and Wizardry titles, is available on Windows and macOS and has received a Very Positive review status on Steam. After a December 6 update, users reported virus warnings from antivirus programs like Norton, Avast, and McAfee, which were triggered by the game's use of the Pyxel engine and Pyinstaller for executable files. The developer advised users to exclude the game's .exe file from scans, but on December 12, Steam blocked the game from sale due to multiple virus reports. The developer requested a rollback to an earlier version, which prevented future updates. They purchased Norton Antivirus for testing and attempted various solutions, including filing reports with antivirus companies and considering a code signing certificate. They identified that the use of Python’s “os.remove()” function contributed to the false alerts and implemented a workaround. However, antivirus software retained memory of flagged files, causing continued blocks. Ultimately, flipping the fairy image associated with the game’s file by 180 degrees allowed Dungeon Antiqua to bypass the antivirus barriers and resume updates.