

The first tests are short and don't allow you access to the portal gun at all (in essence having you tossing a ball between your hands) and only when you've got a basic understanding of the concepts of portals will it let you go on. The genius of Portals level design means that every test serves a function, educating you about the initially non-intuitive portals. That, as you might have guessed, is the solution to one of the tests. If you slap a portal high up on a wall, leap into a deep pit, and place one underneath your feet just before you hit the ground, you'll come screaming out of the wall at high speed, propelling yourself across the room. As you enter one, you exit the other, if you fall through one, you'll fly out the other with the same momentum. These portals are fired from your portal gun using either the left or right-mouse button, and are placed against walls, floors and ceilings. You can have two open at any given time, one blue and one red. It's far more interesting than Episode Two, and as it all sits in one easily digestible four-hour long lump of gaming, you'll beat it in one gloriously fun sitting. 1 already know the answers, and as silly as it sounds, Portal is a game just as much about its story and narrative structure as its puzzle aspects. Is this cake a devious and imaginary incentive? Is it chocolate? These are just two of the questions you'll no doubt be asking. Throughout, the sarcastic, disembodied voice of GLaDOS - an experiment controlling Al routine - guides you methodically from test to test, with promises of eventual cake should you

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The game is made up of a series of unexplained tests through the clinical confines of the Aperture Science Enrichment Centre, each one a puzzle to be solved using the eponymous portals. Portal is anything but just a pleasing bonus for The Orange Box, and is instead the most intriguing, original, and surprisingly brilliant part of the triptych. Who'd Have Thought that the runt of The Orange Box litter, having been pecked half to death by it's more established and anticipated franchise siblings, would have fallen from the nest not into the waiting jaws of a metaphor, but into a glowing hole in the ground, popping out of a nearby wall, and into our hearts.
