Regex in the Redirection Manager.

You can find details of regular expressions here:

https://redirection.me/support/redirect-regular-expressions/

I came to this, but it is not true
^/go\.php\?https://gamefa.com/(.*)$

What is not true?

Redirect is not done and 404 error is displayed

And what are the settings you’ve used for the redirect? Have you confirmed that the regular expression matches? Have you read the support guide? https://redirection.me/support/problems/url-not-redirecting/