I am not interested to write down what happened when you get too many games requests and Notification on Facebook , I am interested in to write down the solution of the problem so please follow the bellow steps.
Step 1 Open Facebook app in your Android phone now click on menu button near notification button.
Step 2 Now Click on " Account Settings "
Step 3 Now Click on " Apps "
step 4 Now Click on " Platform "
Step 5 Now Click on " No "
That's it you have done , Now your Facebook account is Free from Games and apps notifications , So Enjoy Now your Precious notifications.
If you have any question or any suggestions regarding my post please use comment box for it. :)
