Portal is an action/puzzle video game from Valve, creators of Half-Life 2 and Counter-Strike. The winner of over 40 awards, including 15 Game of the Year honors, it is one of the most original games on any platform in years and offers gamers hours of unique gameplay. Set in the mysterious Aperture Science Laboratories, Portal is designed to change the way players approach, manipulate and surmise the possibilities in a given environment; similar to how Half-Life 2’s Gravity Gun innovated new ways to leverage an object in any given situation. Players must solve physical puzzles and challenges by opening portals to maneuver objects, and themselves, through space.
Prototype is a single player, open-world action game where players take control of shape-shifter Alex Mercer. In this gameworld you literally are a genetic prototype hiding in human form. You step out onto the streets of New York with no memory, but limitless potential power. As a terrifying viral epidemic sweeps across Manhattan, top-secret Blackwatch Special Forces move in, transforming it into a war zone. Delve into the mysteries of your origin, the true nature of your power and your part in a conspiracy 40 years in the making.