Portal?: Still Alive features the full award-winning Portal single player game from Valve plus a new challenge mode. Designed to change the way you approach manipulate and surmise the possibilities in any given environment Portal has earned over 70 industry honors for its innovative gameplay with more than 30 Game of the Year awards. Solve physical puzzles and challenges by opening portals and maneuvering objects and yourself through space. Now you’re thinking with Portals! Innovative gameplay: Experience the first first-person puzzle-action-adventure game with hours of single player gaming. Extras: The new bonus game introduces new play challenges for the veteran Portal player.