From LXF Wiki

Cedega is an enhanced commercial version of WINE, the Windows compatibility layer used to run Windows apps on Linux. Cegega is oriented towards games, with each new release supporting more of the latest titles. It's developed by TransGaming, and runs BattleField 2, World of WarCraft, Dungeon Siege 2, Madden 2006, Half Life 2, City of Villains, WarCraft III and Star Wars Galaxies among others. An easy-to-use graphical front-end is included.

See the website for a time-limited evaluation download.