Civilization 2: Test of Time is a standalone expansion that takes Sid Meier's foundational empire-builder and stretches it across four distinct scenarios. The standard Earth campaign runs from the ancient world to the space age, while three alternative settings take your civilization through Norse mythology, a fantasy realm layered with a parallel sci-fi map, and an entirely space-based 4X campaign. The core loop remains: found cities, research technologies, manage citizens, and outlast or outmaneuver rivals over thousands of years. Each scenario reshuffles the units and victory conditions enough to feel like a different game wearing the same engine.