What specific games with what specific Mac do you play?
Post the Model Identifier (
GREEN 3) here and the titles you experience the problems with.
Even though some might get annoyed of reading this, the thread title guy strikes again:
A more descriptive and precise thread title will help cater to the right audience and get you more responses. (see rule #3 under Minor Problems)
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Have you also taken a look at MRoogle, since that question may have been asked several times?
Also have a look at the following links, as the information presented there might be helpful in your future endeavours into Mac OS X and could clear up initial confusion and may even prevent harm to your system or your files.
Mac OS X Basics
Switch 101 - guide with articles made by Apple on how to accustom yourself, after you switched to Mac OS X from Windows
Mac 101 - How to get started with Mac OS X
Find out how - tutorial videos made by Apple on how to do certain thing in Mac OS X
Pro tips - tips made available by Apple for easier ways of doing certain tasks
MRoogle - a very effective tool to search these fora using Google and made available by
edesignuk, introductory threads:
1,
2 and
3