So much for playing Portal at the airport 

You have to log into Steam, have PORTAL updated and then ready to go, but at that point you can switch Steam to 'Offline mode'. Steam will then start in Offline mode automatically, so you can play on your laptop in non-Internet areas.
Are you playing on Mac? Apparently there's an issue with Steam games and some settings on Mac OS X. Valve are working on a solution.
Valve give PORTAL away for free on PC and Mac until May 24th
12/05/2010 11:32:35 PM
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For those who have somehow missed the bus up until now... GET ON! *NM*
13/05/2010 02:45:29 PM
- 262 Views
it's not working for me
14/05/2010 12:16:39 AM
- 584 Views

I can't even get it installed.
14/05/2010 04:48:25 AM
- 597 Views
I'm a little annoyed they seem to make you connect to even play.
14/05/2010 01:25:19 PM
- 611 Views
Yeah, that's a pain.
14/05/2010 02:22:25 PM
- 599 Views
Steam should have an "Offline Mode" for you to turn on somewhere. (at least, on the PC)
14/05/2010 03:40:21 PM
- 593 Views
Right, so I got it to work.
14/05/2010 05:18:29 PM
- 647 Views
mine still isn't working
*NM*
15/05/2010 09:38:17 PM
- 298 Views

Finally got it to work! This is fun
*NM*
16/05/2010 12:14:13 AM
- 313 Views

Then why are you still here? *NM*
16/05/2010 01:24:56 AM
- 294 Views
The game is fun!
16/05/2010 01:51:30 AM
- 608 Views
Yeah, this probably one of the worst for motion sickness sufferers.
17/05/2010 12:12:57 AM
- 565 Views
Installing right now.
16/05/2010 09:23:22 PM
- 632 Views