How do I stop stupid notifications on my Facebook?

[Wulfruna]

I see the little red box in the top left of my screen and I think, ooh someone has commented on my wall, or something. No, it's an app saying 'come and play this stupid game'. How do I stop it? I removed them all from my wall last summer but I can't even see how I did that now.

[Bob]

well when they send u a request to play games,click the X button, after u will see Block game? click that

[Stripes]

they disallowed games to notify you earlier this year....