Both Myst and Riven are important historical works in building a bridge between videogames and the arts.
There are a number of reasons that they stand apart from other games.
One of the reasons that it is of great importance, is social - the team responsible for creating the work had a vast vision of the potential of videogames engaging with a broad cultural audience.
To the creators, this especially meant developing methods of interactions with videogames that didn't rely on hand-eye coordination,
as well as an artistic model that presumed a great degree of agency and intellectual autonomy to parse these swaths of digitally imagined myth and history like a literary work.
The second major point of interest is that these games are essentially long exquisitely beautiful explorations of how we as players use the many facets of our perception,
to assemble meaning from the shifting multiplicity of perspective in interactive computer-rendered created spaces, places, and objects.
In this manner, there are clear linkages between Riven and many contemporary arts practices, such as earthworks, installation, site-specific sculpture, etc.
Why do you think Cyan released so many versions of Myst? The decision shows a remarkable confidence;
Did Cyan really expect any of the million of people who have bought Myst to throw more money for a game whose puzzles they've already solved?
If Cyan considered Myst to be essentially just a game, of course, they wouldn't. But they knew that to the people who fell in love with Myst, it's more than a series of brain twisters, it's more than a game.
It's a place, a favorite place, and therefore not exhaustible the way a mere game is. You can't help wanting to see more of it, and at the same time you know that its mysteries will never be entirely yielded up.
And that, is a pretty good definition of art in games.
For me, Riven will always be the closest example of artistic expression in games.
Games can be art, and you don't have to be a passive faggot. You have to solve it, but who am I kidding, most deniers here couldn't solve shit even with a walkthrough shoved up their arse.