I honestly hope the following method works for you, since taking the above route may involve a lengthy period of time. Now, if you can place this within the .htaccess file of your folder where the games are situated, it should prevent any further hotlinking:
Code:
RewriteEngine On
RewriteCond %{HTTP_REFERER} !^http://(www\.)?domain1\.tld [NC]
RewriteCond %{HTTP_REFERER} !^http://(www\.)?domain2\.tld [NC]
RewriteCond %{HTTP_REFERER} !^http://(www\.)?domain3\.tld [NC]
RewriteRule .*\.(jpg|jpeg|swf)$ - [NC,F,L]
Let me know if it does the job.