Yes, each chapter is quite long mind you.
Yes, once you beat a chapter, go to the main menu then click new game and select the chapter.
If you have an Xbox 360, you can go to the game in the game library and then select "Install Game".
Howcast (youtube.com) made a whole series on how to beat portal 2. But if you need the explanation: Step one: Find the redirection cube. Shoot a portal underneath where it is. 2.) shoot a portal somewhere else in the room. 3.) pick up the cube, walk to the laser and slowly rotate until you shoot the laser into the hole. 4.) walk up the Panels, and shoot a portal on the ground. 5.) Shoot a portal underneath the cube. 6.) Set the cube on the button. EASIER WAY: 1.) get the cube by shooting a portal underneath it, and shoot a portal somewhere else. 2.) walk about 10 ft away from the elevated area with the door and put the cube down. 3.) jump on the cube, and shoot a portal near the door. 4.) shoot a portal somewhere else, then go into the portal, and set the cube down on the button.
Portal or Portal 2 mods on Steam is installed by first Downloading it and extracting it. Then copy the map file into your Portal 2 maps folder which is Run the game.
Yes and Portal 2.
No, Portal is for PC only. Portal 2 is for PS3,Xbox 360,and PC. Plus it would suck on PSP.
Portal - 2002 Portal 2-21 was released on: USA: 18 November 2003
Portal 2
It will be on Mac the day Portal 2 is released.
Portal 2 comes out on April 18, 2011.
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