Honestly, I use this way to get flash game into my hand.Ok,there is many way to rip the flash file from a website one of the way is
For Firefox user

1) Click on Tools - Page Info
2). Then, click the Media Tab on the Page Info Windows
3). The media tab will have complete list of Images, CSS Files and Shockwave Flash files that were downloaded by the Firefox browser while loading the page of the website.
4). Scroll down the list and locate the .swf file.
5). Click the “Save As” button. Choose some folder on your hard drive and save the file.

For IE users

1) Firstly, click Tools - Internet Options
2) In the General Tab, click the Settings button available in the Temporary Internet Files group.
3) Click View Files to open your Temporary Internet Files folder.
4) Click View - Details. Now click View - Arrange Icons By - Internet Address. Depending upon the webpage, there could one or more Flash files (Shockwave Flash Object) under the Internet Address
.5) Once you find the right flash file, right-click and choose Copy. Then paste the .swf file in any other folder,such as My Document