Stardock's digital distribution platform, Impulse, is having its weekend sale, knocking 50% off the regular price on Iron Grip Warlord, Immortal Cities: Children of the Nile - Alexandria and Hacker Evolution, as well as dropping the price on a slew of titles like Prince of Persia, Kingdom Elemental: Tactics, Nemesis of the Roman Empire, Warlords Battlecry III, Supreme Commander Gold, Scrapland, and Capitalism II.