How the forget is one going to play portal with a xbox/ps3 controler.
I just can't understand how.
Portal relies on very precise and fast aiming, only possible with a mouse
I beat portal 1 on the Xbox 360, I would argue the opposite, It's a puzzle game, so it requires more thinking than fast reflexes.
If you are going to get call of duty, don't buy all of them, all you really need is the latest one, as the community migrates to it every time it's released. You probably won't find many people on the older versions, and the people you do find will probably be really good.