Your citizens don't stay put in Stellaris-style 4X strategy game Final Vanguard - start a war and "entire waves of refugees can emerge"
Final Vanguard is a real-time sci-fi 4X grand strategy game that puts an unusually big emphasis on migration. We've seen migration mechanics in many 4X games – pops can shuffle about in Stellaris as you slop your colonies across the map, populating the periphery and slowing the development of your homeworld – but Final Vanguard's creators Heavy Pepper Inc want the feature to be central.
It's part of an ambition "to model a civilization made up of interconnected systems that influence one another over time", with everything from fleet manoeuvres to industry forming part of "a network of dependencies", rather than treating planets as isolated upgradeable nodes.