League of Legends!
some games
Yes. You can install and play games in Windows 7.
Yes. It is possible to play Windows games on Macs that use Intel processors by installing Windows on them using Boot Camp.
some games
No.
Yes they should be able to.
Yes.
No i cant
With a couple of exceptions, yes, you can.
All games that say they are compatible with.
Powerbooks use the PPC processor which does not support running Windows and so they cannot play games written to work with Windows.
A lot of games have mac versions of their games, for example all of the sims games have mac versions... but if the game you're trying to play is not a mac version you can't play it on a mac unless you install vmware fusion or paralells, both of which allow you to install windows on a mac sorry that I could be more help CrossOver Games is software that will allow some Windows games to be played on a Mac without running Windows but it does not work for all games. (See links below)