Base Game via GOG & Merc Expansion via Stardock? Posted on Thursday, June 30, 2016 I own Gal Civ 3, which I purchased/play through GOG. Can I purchase the Mercenaries Expansion Pack from Stardock and have it work with my DRM free GOG version of the game?*Why?: Because it's on sale on Stardock and Steam, but not GOG. Thanks!