I dont understand people tieing game length to its bucks. Its like if you consume the game and throw it away. Well, if games would be some sort of sustinence, then you could compare their lengths to prices...
It depends on why you play the games. I always played the games for two things:
1) Competition. Like League of Legends, World of Warcraft PVP etc
2) Sudying the alternative reality, finding ways to be effective, learning the game world, beating the game with different strategies, increasing my difficulty. This was the best experience i ever had - in games like X-Com, Might and Magic, Jagged Alliance... they do not make such games anymore
And Amnesia gave me a third reason. This is the first game that really, REALLY immerses myself in the story. It gives me pure emotion, like you know, Transformers that fed on pure energy - Energon... Same here. And i never had it before with other games, honestly i never even considered playing "horror" games since movies sucked and i didnt see any good games around either.
Therefore, Amnesia did not only give me the play value of X hours (which i have not yet done, i think i'm going much slower than others since i am a carebear, i thread carefully, build shelters out of boxes just in case, etc.).
* It gave me a hell lot of lulz watching videos over the net how the people FREAK OUT (youtube for "amnesia what the fuck" - its insane!)
* I will for sure replay it again to hear all the dev commentary (another X hours of play)
* It gave me something to share with my wife (we play it together since she absolutely loves horror movies so she likes to watch me play)
* It gave me a new insight into game design and completely new vision of videogames
* It gave me a new whole geanre to try out i thought i'll never have fun with, however i fear that only Penumbra game series would give me something similar, since from what i heard, alot of other horror games arent that terrifying
* It gave me something to talk to about to people and share
* It gave me a very interesting blog to read that takes on very important points
* It is like second in the last 10 years game that i bought and did not regret it (other was World of Warcraft). Yeah i'm a pirate and this is the way to live, because in our era, computer games mostly SUCK. I bought some games and i totally regret it (can remember Age of Conan, Warhammer Online, Demigod, spent some money on League of Legends, Minecraft...) since either the game was crap (first 3) or the game was buggy and support was nonexistant (last 2)
* It gave me emotions i will remember and time that i spent with great pleasure. Honestly, i never thought being scared could be so great! Its almost like you regained something you had before but since long lost or forgotten..
And i think i can go on and on!
So, how can we just tie the game length to the game pricetag?
Maybe i am unique in that sense, but i often either think "this shit aint worth a dime" or "i'd pay way more for this if i'd be asked to".
Of course in current world with piracy around, which i think is not bad as it is, still provides temptation. And it was easy to win against the devil and give away 20$ for this game (even after i was already playing a fully functional pirated copy, and KNEW i could never worry about paying), it would be harder to give away 40$, and even harder to give away more.
Still, i must say this experience is worth to me MUCH MORE for that.
Think about it in this way: game worth isnt what you would pay for the box (dont wanna pay just pirate it and forget it). Game worth is a sum you would agree to exchange for all what the game gave to you.
I mean: ask those who bought the game and enjoyed it - would you agree now to be stripped of all those emotions, have all those good (or awful, however you describe fear and horror) times you had playing Amnesia removed, destroyed, taken from you with a 20$ bill as a compensation?
I doubt anybody would agree.
This means that a good game is worth much more than that.
Bottom line:
Game must not be X hours long per Y $.
Game must give you something that would make your time spent on it absolutely worth it, and leave you wishing for more, but on the other hand should not leave you with any anti-climatic feel (I can suggest you the Duke Nukem Forever ending to understand what anti-climatic means... or if you are anime fan, ending of Akagi would fit...)
Then you would never feel you got cheated on the value...