.exe or .bat files inside are almost certainly malicious.
Hackers often name files after popular urban legends to trick curious users into downloading "Stealers" or "Ransomware." projectcrystalv2.zip
The creator went offline, leaving the "lore" to be filled in by the internet's imagination. projectcrystalv2.zip
Many investigators believe Project Crystal was an that lost its creator. It likely started as a narrative-driven puzzle. projectcrystalv2.zip
Claims suggest it contains documents from a defunct cold-war era psychological experiment.