No you cannot make a snow portal without a mod and mods are yet to be enabled on 360 version so that would be a no.
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.
If you've got a PS3 or Xbox360, you might consider getting The Orange Box, which comes with Team Fortress 2, Portal, Half-Life 2 & Half-Life 2 episode 1+2. You might want to check online for the PC version.
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
yea all xbox games are compatible with xbox360
its from the game portal and portal 2
Wait for Portal 2.
It will be on Mac the day Portal 2 is released.
Portal 2 comes out on April 18, 2011.