For The Next Few Days, Portal Is Free till the 20th of September It's 6-7 GB's in total after you download the game plus steam software.
Just started playing it, it's the first game i've played on PC in ages, (apart from The Sims)...gee the controls are hard to get used to.
I'll have to try putting Spoiler neurotoxin on my cereal. It sounds delicious, like that cake... So yeah, I finished it. Great game, but it's pretty short. After I finish the bonus levels I'll definitely have to buy the sequel.