Now you can play many windows games (World of Warcraft, Call of Duty IV, Prince of Persia and so on ) in linux ubuntu. Here the complete list of games that you can play in linux.

Install (linux ubuntu)

1) Go to http://www.cedega.com/subscription/subscribe.html and sign up for a free trial (you don't have to pay just sign up or it won't work).

2) Once signed up install the RPM/DEB/TGZ for your system.

3) Start up Cedega and let it update to the latest UI.  Installing the engine will fail cause you haven't paid

4) Install Spore Trial

5) Copy the winex-7 folder to: ~/.cedega/.winex_ver

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