Epic Games and Valve have automated tools (like VAC for assets) that scan builds submitted to Steam or the Epic Games Store. These tools create "hashes" (digital fingerprints) of every asset. If your uploaded build contains a hash matching a known pirated asset from a previous leak, your build is rejected immediately.
Leo froze. He deleted the audio file. But the whisper remained, attached now to the grandfather clock. Then the paintings. Then the wallpaper. unreal engine pirated assets