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
There are no zombies on Just Cause 2.
Portal 2 comes out on April 18, 2011.
It will be on Mac the day Portal 2 is released.
Wait for Portal 2.
its from the game portal and portal 2
no You idiot, it is rated M. And it is rated M because there is a extremely large amount of blood, there is a lot of violence, and there are some pretty scary zombies O_O
Normally in the 2 first levels of plants vs. zombies the zombies are the newspaper zombie, zombie and zombies that are in costumes are in those levels.