MacOS version from itch.io: unzip correctly but doesn't start, "CoQ.app" is damaged [workaround included]

[Roberto Maurizzi]

After downloading the “cavesofqud-osx-default.zip” file (CRC32: 8d273526) from itch.io and extracting a “CoQ.app” application folder, trying to start it I get this message:

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This happens both if I try to open it from my Downloads folder where it got extracted and after I move it to the proper “Applications” folder (and even if I extract-and-move without trying to run it fro Downloads)

Executing sudo xattr -rd com.apple.quarantine /Applications/CoQ.app/ fixes the problem and allows me to start the application and reach the “New game” menu

MacOS Big Sur 11.5.2, Intel.