So before I buy this game....

[Grimulkin]

How much more content is there beyond what the demo had? I actually made it to the antichamber in the demo and there was a note there that said something like "You're not supposed to be here!" Beyond reaching that room, is there enough additional content to justify a 25-30$ price tag?

[Celebrim]

Without spoiling anything, the Antechamber works different than it did in the demo and in my experience, reaching it was not even the half-way point in the game.

[MaSeKind]

Yes

[bshock]

Yep