A lot of those games currently have no cheats. They were just brought to the cheats page through a search engine like google.
So yay for this paragraph that brought them here:
"Welcome to the (ENTER GAME NAME HERE) cheats page on gamrReview. Here you will find everything you need to help with the game including detailed walkthroughs and guides, hints and tips, cheat codes and unlockables. If you can not find the cheat you are looking for, please check back periodically or sign up and track the game for all the latest updates."