Portal is free until May 24th. Also, it's on Mac now.

[Viridis]

Originally Posted by Sky Warrior Bob

That prior link, was it for this Portal Prelude, or is this something entirely different?

That's something else. I've downloaded both and just started the prelude. It's not bad.

Originally Posted by Mauve Mage

Probably a dumb question, but does anyone know if Mac users will be able to play on Steam with PC users?

For TF2 I know the answer is yes. No idea for other games.

Originally Posted by Valve

Q: Hmm, that all sounds pretty good. But I'll bet I can't play with my friends who own Macs if I'm on my PC.
A: Mac and PC users will all play together, on the same servers. We're not creating two separate universes. We're all going to be one big, happy family with guns locked in a bloody, never-ending struggle for cap points.