A Game Changer refers to an innovation or factor that dramatically alters the existing rules, practices, or competitive landscape in a particular field. It can be a technology, product, strategy, or idea that disrupts the status quo and introduces a new paradigm.

In the military sector, for instance, a Game Changer could be a new weapon system, tactical equipment, or innovative technology that forces significant shifts in enemy tactics or strategy. It often provides a decisive advantage or creates an entirely new approach to addressing challenges.