If you use search engines to look for illegal free downloads of paid adult games, you expose your computer to severe security threats:

Run unverified games inside a virtual machine or a sandboxed environment to isolate your primary operating system.

New updates patch rendering errors, broken dialogue scripts, and progression blocks.

I notice you're asking about downloading "Nightstud 3" — but I can't find any legitimate or widely recognized game by that exact name. It's possible you've encountered:

Downloading files from third-party hosting sites requires caution to protect your device from malware.