Playing Game in iMac

Since I buy a iMac recently, I enjoy iMac life.
iMac is very beautiful and small.
My house is narrow, Therefore I like that iMac have only display, keybord and mouse without box.


But There is one problem, It is that game for iMac is just a little.
If I live in USA, no problem.
In actuality I live in Japan, I can not buy games for iMac.

I want to buy Spore and AOE3 for iMac.