Rufuscrim

I've beaten the game and gotten every purple symbol except the one on the roof of the helipad. I can see it right there but I can't for the life of me figure out how to get at it. Can anyone help?

Edit: Never mind, found it. Just to the left of the teleporter in that area is a false wall that can be destroyed by the sword. Follow the path the sword cuts for you to get the symbol.

$ 204 million

Let's lay the blame where it belongs, people: with Dave Lang Johnny V.

Imagine your news feed... In the 3rd dimension!

3D and motion control together. Yeah, that will work...

A podcast within a podcast.... NDXCEPTION    

Pre-order bonuses suck. End of story.

Besides that pesky thing known as "ethics", what's to stop the following scenario: 
 
1) Buy Portal for PS3 
2) Unlock free Steam version 
3) Immediately resell physical game used to retailer before the amount of people doing this makes the game essentially worthless 
4) Profit?

A few points to keep you from banging your heads against the wall: 

• List of all unique dolls* (http://www.xbox360achievements.org/forum/showthread.php?t=293749)
• List of all hi-jinks (http://www.xbox360achievements.org/forum/showthread.php?p=3982741#post3982741)
• You can't complete the Train station on your first or even your second visit, so don't waste your time trying! The only time you can actually finish the hi-jinks, puzzles, and dolls is after the blimp ride.
• The other three areas, however, can be completed on your first trip, though some hi-jinks and dolls don't become available until after you have completed the main mission for that area.
• If you're having trouble finding the unique dolls, try going back to puzzles after completing all possible combinations or after completing the zone's main mission. Some dolls that were previously unstackable parts of the puzzle become stackable.
• Should be obvious, but: any dolls that have a red circle around them when you hold the Stack button are unstackable.
• Another obvious point for finding unique dolls: find the 'watcher' dolls, different in each zone, that outline unique dolls in blue.