 Examples include "Warzone 2100" (a real-time strategy game) and "Micropolis" (a city-building simulator based on the "SimCity" source code).Advantage of such continuation projects is that these games are already "complete" as graphic and audio content is available, and therefore the open-source authors can focus on porting, fixing bugs or modding the games.In a 2004 article, Adam Geitgey questioned the compatibility of the open-source culture with respect to the game development process.