Layton Shumway writes: I'm a sucker for Myst. I'm also a sucker for Tron. (Yes, even Tron: Legacy.)
New indie game Fract combines both.
It's a first-person adventure game, now available in beta form as a free download for your PC or Mac. And it looks beautiful, with a polygon-based, neon-glowing art style reminiscent of games like Rez, Darwinia, and yes, Tron.