Half a million copies and counting\u00a0for Paradox's Hearts of Iron IV. Paradox Development Studio has announced that Second World War strategy game,\u00a0Hearts of Iron IV, has quietly sold over 500,000 copies since its global release in June, 2016. This achievement\u00a0follows bumper\u00a0sales for the Swedish company's other titles, most notably, Stellaris\u00a0and Crusader Kings II. Fredrik Wester, CEO of Paradox Interactive, says that these recent successes are the result of\u00a0the studio's approach in\u00a0focusing on high-quality\u00a0PC strategy games targeted at specific audiences. \u201cThe PC remains the primary platform for games of this nature.\u00a0Even genres that have traditionally been seen as niche can find a large audience, if a developer is dedicated to quality, variety and learning from both previous experiences and the community at large.\u201d Hearts of Iron IV recently received its first major expansion, but this is just the start\u00a0according to\u00a0lead designer, Dan Lind, and improvements to the game will continue. "As a result of this success we are able to take advantage of extra time to add tweaks and polish to the game. Our community has high standards, and we will work hard to live up to their expectations in the coming weeks and months. We really want Hearts of Iron\u00a0to be the best it can be for our fans." The wider Paradox group can also count the\u00a0critically acclaimed Europa Universalis\u00a0and\u00a0Magicka\u00a0series among\u00a0its recent hits, as well as\u00a0Cities: Skylines, which was recently announced for rleease on Xbox One.