Civilization, released in 1991 by Sid Meier and MicroProse, is the turn-based strategy game that defined an entire genre. Starting from a single settler unit in 4000 BC, players build cities, research technologies, manage economies, and wage war or negotiate peace across thousands of years of human history. The goal is simple to state and endlessly complex to achieve: outlast every rival civilization through culture, science, military conquest, or by launching the first spaceship to Alpha Centauri.
What made Civilization revolutionary was its scope paired with its accessibility. The technology tree gave players a tangible sense of progress as they moved from Bronze Working to Gunpowder to Nuclear Fission. City management rewarded careful planning, while diplomacy with AI leaders introduced unpredictability that kept every game feeling distinct. The combination of exploration, expansion, exploitation, and extermination - the "4X" formula - was codified here and has influenced strategy game design ever since.
Civilization established the hallmark of the series: the "one more turn" compulsion. Every session threatens to stretch into the early hours as you chase one more wonder, one more technology, one more city before you stop. Decades later its design principles remain the benchmark against which every 4X strategy game is measured.