If more gore and war is your style, Steam has bundled and discounted the Dawn of War series for a mid-week sale. The bundle includes all previously released games in the series on Steam as well as the upcoming Dawn of War 2: Retribution expansion, complete with the Steam-exclusive "Ork Pack."
The bundle is available for $59.99 ($24.95 off). Individual titles in the series--not including Retribution--have also been discounted if you're only missing select titles in your library. Owning any one Dawn of War product on Steam will also grant users beta access to Retribution, which is happening now.