Either double click the shortcut or the HaloWarsDE Mod Manager. Halo Wars: Definitive Edition PC Gameplay (GTX 970)Halo Wars: Definitive Edition is an enhanced version of the real-time strategy classic, Halo Wars, updated.Sitting at the nice price point of 20, fans of the original 2009. Microsoft Announces New Free Play Days for Both Halo Wars: Definitive Edition and Halo Wars 2.