Voxel Animation Like Octopus Traveler

Hi, I was just wondering how to create an entire game with animation like Octopus Traveler. The problem is : i don’t think create 1000 mesh of each frame of an animation and switching with some blueprint is a great idea, and i don’t have any idea of how to do this. !

There is a video explaining how Octopus Traveler was made, although in English.
Actually I think they really did lots of work by hand.

These are sprites

Those are sprites, they are just made in Pixelart Style. So you can make them like a flipbook or via bone/mesh animation with tools like Creature 2D (from the trailer it seems, that creature 2D already has a retro pixelfilter installed):…mesh-animation

or Spine 2D