And if it's much longer... then I'm going to get bored of it. As yahtzee said, portal was the perfect length because it left you wanting more, but never crossed the line where it became repetitive or monotonous. For those that wanted to stretch the gameplay out there were all the additional challenges and puzzles, after all, so everyone had something.

As fun as Portal 1 was, I would never have gotten it if not for the Orange Box, not unless it was selling for $10 or less. And the same goes for Portal 2. Maybe $15 for it, but no higher.

And in answer to Zalis above, if Bulletstorm (a name that is vaguely familiar to me?) is a crappy game and costs more than Portal 2, that still doesn't mean that Portal 2 is a good value. It just means that they're both ridiculously overpriced. As a rule of thumb, I typically want to get an hour of enjoyment for every dollar spent. But my expectations have no doubt been tainted by RPGs.