Play Open Source Linux Games
Wine-Gaming (No real Linux port, Grab Wine and make the WinGame work!)
CrossOver/Cedega (No real Linux port, buy special Wine Builds and get Windows disk to work!)
Cedega-Spore-way (No real Linux port, Buy the Windows disk with a special Wine/Cedega build)
IdSoft-way (Buy Windows disk and stick it into Linux client)
LGP-way (Buy Linux game disk)
LGP-way-DRMed (Buy Linux game disk with DRM - LGP stipulations apply)
the first, second, and id software options are my favorite and that's how I roll.