strategy game, Civilization IV, isometric view, hexagonal tiles, detailed map, ancient era, city-building, warriors, settlers, rivers, mountains, forests, diplomacy screen, technology tree, cultural influence, turn-based, global domination, multiplayer, fog of war, soft lighting, UI interface, in-game encyclopedia, historical leaders, wonders of the world, trade routes, resource management, expansion pack, mod support, epic soundtrack, 3D graphics, PC gaming.