Machina-AX said:
Yeah sure:
1-2 hours for those bonus chambers, depending on your skill level. Longer if you get stuck on one of them. There are also the new advanced chambers, which are 15-30 minutes extra. And the achievements will take 2-3 run throughs of the main Portal game to get for most people, although you can probably do it in 1 run through if you use a guide and you get lucky with the achievement that requires you to only ever enter the orange portal. That achievement is a bitch because you don't know if you've done it right until the end, I've tried getting it twice now with no luck.
I've got a review all written up with this info. in and it's ready to go on the main site but we're currently debating the score so I dunno when that'll be put up.
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If you're referring to the advanced versions of the chambers in the main game, those aren't new, they were in the orignal version of Portal. The only new content is the 14 bonus chambers and the new achievements.
And why are you struggling with Out of the Blue?
Right Trigger = Where You Want To go
Left Trigger = Where You Are
Just remember that, and always shoot a new set of Portals anytime you go anywhere. I did it and the bullet free achievement in the same run. Only tricky part is at the end of chamber 18 when you're flying in the air you have to remember to shoot a new portal where you land before hitting the ground.