In publisher NIS America’s eyes, Cave Story 3D is a “fully reconstructed” version of the shooter, made to take advantage of what the 3DS has to offer (namely, depth).
As you’ll see in the screen below, the Nicalis team behind the project has created a 3D ‘spline’ that maps to the game’s original 2D grid. So, Cave Story 3D is still a 2D game at heart, but the new curves will offer up some different looks at environments, as well as some new ways for you and enemies to traverse them.

== TEASER ==“We’ve gone to a level of detail that probably is unheard of compared to what we did for the original WiiWare version,” producer Tyrone Rodriguez told GR in an interview. Cave Story was released in 2004 for the PC. It has since seen re-releases on WiiWare and DSiWare.
“And now, as you said, you’ll see characters are fully 3D. The main character’s really cute -- he’s got a scarf, he’s got this really great hat, and we’ve modeled him, along with the accompanying cast, as well as the enemies. The weapons are in full 3D, all the items, everything you see in the world has this level of depth that you’ll be able to really utilize with the 3DS’s stereoscopics,” Rodriguez said.
NIS isn't talking release date and pricing yet, but as Cave Story 3D is a retail cart release, you can probably expect the pricing to be in line with most other 3DS games. Pixel is also at work on a brand new, original game that's in the pre-production stages as well.