Prototype is an open-world action-adventure game where players control Alex Mercer, a shape-shifting antihero with superhuman abilities. Set in a fictionalized New York City, the game combines combat, stealth, and exploration as players use Alex’s powers to battle military forces, infected creatures, and uncover a conspiracy. The game features a dynamic combat system, allowing players to transform their limbs into weapons and consume enemies to gain their abilities. The story unfolds through a series of missions and open-world activities, revealing Alex’s quest for revenge and discovery of his origins.