Wine is free, and there are a bunch of RPM's and stuff for it at sourceforge (more information on the wine website). If you want to play most modern games under Linux you will probably have to use WineX (
http://www.transgaming.com ), which is Wine with DirectX support (which ISN'T free
) Of course, sometimes you may come across certain... ah.. materials... while browsing the web...
I definitely know it is possible to play Morrowind decently with WineX, although I have yet to get it working myself (my issue is a video card problem, though, so you'll probably be ok) Sea Dogs I've never played myself, but it would probably work too. WineX is especially a good tool if dual-boot with Windows isn't really an option (for example, when you get Linux preinstalled and so, dual-booting would require buying a copy of Windows [which
I'm not about to do])