Portal: Still alive is a really great game made by valve. You play as a test subject in a top secret Facility, Aperture Science Labs doing nothing other than tests.The point is to make it to the end of a test chamber using the portal gun. The Aperture Science Hand Held Portal Device, (or Portal Gun for short) isn't a gun that shoots lasers or throws bombs or anything like that. The portal gun shoots two linked portals, and orange and a blue one, that you can travel through. In short, you can go through one portal and come out  the other. The Tests are easy at first, for instance, putting cubes on buttons. however, as you finish more tests, they get harder and more complicated. They add new testing elements such as energy balls, moving platforms, toxic goo, and turrets. As you go through portal, there is an AI voice that guides you through the tests named GLaDOS. GLaDOS is a strange, female, Robotic voice that speaks to you during the tests and is in control of Aperture Science Labs. She is the one who is watching you and who made you her test subject. One test element that is very peculiar are the turrets. The turrets of course shoot bullets at you, but the thing strange bout them is that they have  a cute but sinister voice and say things like "Are you still there" or "I See You". In one test, Glados gives you a cube named "The Companion Cube" which you hold throughout the test but soon, you must let go... At the end of the tests, Glados Promises cake however it appears to just be a trick .As you explore the rest of aperture science, you realize that there are no workers or scientists, Just Glados. It's really eerie. What happened to Aperture science? Where are the workers? wheres the cake? well now your'e thinking with portals!