Since this is open-source fan software, "verified" usually means the APK is signed by the original developers and has not been tampered with by third-party sites injecting ads or malware. Always scan your APK files with an antivirus if you are downloading from a generic "APK mirror" site rather than the official community channels.
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It looks like you are searching for a specific version of a popular Mario fan-game, likely looking for a safe way to get it on your Android device. Since this is open-source fan software, "verified" usually
