How can I remove game requests from the sidebar in my news feed on Facebook?

I have a friend (we all have one of these) who constantly sends me chain messages (forward or you will be struck with bubonic plague) or religious (worse) ones and game requests.

I sent her a message asking her to desist in sending me these things or I would be forced to unfriend her. After two messages, she said sorry and stopped sending the messages.

But not the game requests! I can’t see how to delete them. Is it possible?