My answer is that if there's no real interactivity, you don't even feel like you're a character in their world. You feel like you're just an observer. Being able to interact with things, and opening the occasional door or turning on the occasional radio doesn't count, is an important factor in immersion. Even when that interaction is just murdering everything in your path, it makes the experience that much more real somehow. The quality of said interaction is important too; in
BioShock's later levels, for example, it felt like I was just being herded through more areas so they could dump more exposition on me that they couldn't have revealed before the big twist, and you yourself brought up this complaint about the section of
Portal 2 where you escape the testing facility.
Also, I know I've said this before, but if you're reading this: PLAY JAZZPUNK. Seriously, it does an excellent job of blending bare-bones adventure puzzling with comedy that doesn't wear out its welcome.
Alex Baas said:
Well I enjoyed Dear Esther simply because it was a nice relaxing way to kill 90 minutes. I don't think of it as a game but more as an interactive exhibit. As an exhibit is how I think games like this should be played if they are going to be designed in the manner that they have been
The difference, as I brought up last week, is that you don't have to buy a museum exhibit to experience it. Even if you paid admission to the museum itself, you probably didn't do it just to see one thing and you won't be taking it home with you and having to find a place for it on your shelf.
Dear Esther worked fine when it was a free mod, something to say "Hey check this out if you get a chance" and there was no investment but our free time. Which isn't to say it's worthless; worthless is when something is so bad that it's a waste of your time as well as your hypothetical money. Even after it was rereleased on Steam, it felt more like a chance for people who had already been through the original and thought it was the bee's knees to replay it in a prettier form in exchange for dropping a little change into the tip jar. If Steam ever offered the ability to release things for free and put up a voluntary donation slot, "virtual exhibits" like this would be a perfect fit for that system.