There is a offline co-op mode (in PS3 atleast) so you can bring your friend and play with him.
Wait for Portal 2.
Yes. Portal 2 supports both online and offline multiplayer.
Look for the a Big Disk that's on the ground or table and put it into the DVD player( the one that has a big tv that's on)
yes in vs mode and coop
no, portal, (unlike its newer, more interactive counterpart) is not as good as portal 2, portal only has solving much more difficult tests, and, although they are funny, a few comments by GLaDOS, however, if you are more for solving puzzles instead of having a complex and interesting storyline, go ahead. in my opinion, there is no comparison to Portal 2.
complete the game then go to the sea
Yes. Go to Multiplayer and choose "Splitscreen"
Yes it is two player on the same console and 4 if over xbox live
1- open portal 2-go to bonus maps 3- click import bonus maps 4- go to the computer's hard drive, click PROGRAM FILES, STEAM, STEAMMAPS, (YOUR STEAM USERNAME), PORTAL, PORTAL, MAPS, then the new folder you created.
Kid vs- Kat - 2008 Coop D'Etat The Incredible Shrinking Coop 2-24 is rated/received certificates of: USA:TV-Y7
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.
No.