At the moment, that might be the only Myst like game out there. However, I might wait on realMyst. For starters, even on a relatively decent PC, it struggles to run, and I can't imagine how it would run on a switch. This is largely because it's a port of realMyst into Unity, a toolset that Cyan doesn't typically use (their recent projects have all relied on Unreal), and as a result, it's a weirdly buggy mess.
A few months ago a
brand new remake of Myst just launched, with timed exclusivity on the Oculus Quest. It will be receiving a PC port at some time in the future and I have to assume console ports. That's because it's a bit more than a standard port of Myst: new level geometry and assets (realMyst and it's variants are based on old art assets ported to new tech, and over time they kinda lost the plot (shiny rock walls anyone?)), leading to a more lived in, natural feeling Myst island, with new areas around linking books. It also has the ability to completely randomize puzzle solutions so if you've played it a million times, it will still feel new. I got physically stuck (as in: couldn't move) on the spiral staircase in Channelwood, but patches have come out since so I bet it's a bit smoother now. The one big downside? No FMV. It's all CG faces that vaguely look like the Apple Memoji stuff. I wrote about it over
here.
I need to get back to and finish Riven, but there's good news and bad news on Riven...
Bad news: they lost everything. All source code, video files, audio files, and assets are gone.
Good news: fans are taking care of it. A project called "The Starry Expanse" has been working on a VR/flatscreen "realRiven" remake for a couple of years now, and as a fan project, predictably, it's been...creeping...along...s l o w l y.
Better news: they got bought BY Cyan! Last we heard Cyan was "auditing" their work, and Cyan proper will be working with these fans to get a nice modern version of Riven out. You can check out their blog
here but they haven't updated since this time last year. My two cents: Cyan seems to be two teams at the moment: one working on Firmament, their next big project after Obduction did well enough to help keep the lights on, and one working on this new Myst remake. Once work is done on the Myst remake, I have to assume the Myst remake team will hop onto the Starry Expanse project