The original Myst has been available for iOS for a while now, offering up that game's classic click-to-explore puzzles on your iPhone, iPod touch, or iPad. Now, Cyan Worlds has released realMyst, a 3D re-imagining of the old school title that features the mysterious island of Myst.
Unfortunately, the game's only for the iPad 2 or the current iPad (iPad 3), so you'll need one of those devices to play the game (presumably because the graphical fidelity just needs that much power). The title includes the full original Myst in 3D, plus the add-on Rime Age and extras like a hint guide, should you get stuck. Right now it's available for just US$6.99, but the price is set to go back up to $9.99 soon.