By the way, I understood the offer as "Play for free until 24th May, buy then if you liked to continue playing". Anyone else?
Of course 10 days is more than enough to finish the game, and since i've already played it once on 360, it doens't really hold much replay value for me.
Absolutely it's enough to finish Portal. Heck, I finished in about 4-5? hours this afternoon (apparently when you install the Portal demo it preloads Portal for you; only a 124 MB "patch" to play was required, w00t!).
the site has this message:
Act before May 24th to get your free copy of Portal!
So, all you have to do is click on install game and its registered to your account... and per the wording above, I'm pretty sure you own the game outright then.
I certainly hope so, because I think that Portal is one freakin' awesome game. I'd be pretty pissed/depressed to have it as my own, and then have it not be mine anymore.
"I don't grin like a moron, I grin like a sociopath."