Each game is free to download or play on the web.
Disclosure: I worked on the game which is featured first and modeled for one of the characters.
Link to Original Source
If your wife doesn't need intensive gaming or complicated environments and only uses a laptop for web browsing, office work or other rudimentary tasks then I would also say go for Linux to save money. You can buy a basic laptop for pittance or, if she doesn't mind the design, just install it on the mac.
I still choose windows because I'm a hardcore gamer and on that front, Linux still disappoints me.
If you want to buy a new windows laptop, here's what I did. First look at a competent company, as far as construction is concerned. Then look at the work space the laptop offers and then match specs which, as far as I can see, are not different from the mac.
I got a Toshiba Satellite L500 which is big and wide with a full keyboard, from a company that built my wife's still going eight year old machine. It has a decent CPU, GPU combo that can even run Crysis well. Perfect for my gaming needs.
If you only want one for office work, I'd go with a Lenovo laptop which are usually smaller, has a very comfortable design for long periods of work (I just love the joystick, they have) and they are also a very competent company (my brother has one which he has worked on for several years now). You don't need a very powerful CPU so just pick one of the Intel E brand or an AMD Athlon. And unless some high def video is involved, pretty much any GPU would do. I wouldn't go for less than 2GB of memory either way. And you might want to try breaking a 500GB HD in half and make it dual boot with Linux.
Even bytes get lonely for a little bit.