Most probably, these games can be played only through Facebook. However, it may be possible to save the flash game files and play them. The trick is to save the .FLV file and launch it through the browser. To get the game file, you have to save the whole page where the flash based game is loaded and save it into a folder using the browser. Open the folder and find the .FLV file and launch with the browser to play. Try it, there is no surety that this will work though.