look what ever game you want and add the word mods to the end on google. e.g oblivion mods, GTA mods
go to esnips and type the game u want
GTA IV
to download for free you can try PIRATE BAY. but don't just go into the site. if you have search engine just type DOWNLOAD GARFIELD GAME PC IN PIRATE BAY.
maybe this site can help you www.organizationex.webs.com