Christoph Minnameier

Christoph might be called a solo-dev in the sense that there is no company or employees and that he creates the complete experience on his own - except for art and voiceovers.

On the other hand one might argue that it makes utterly no sense to call him a solo dev because he could never create such a beautiful game on his own! There are several pixel artists and voiceover artists working with him, most important to mention are Fabian Jastremski (aka @vierbit) for character art and animations and Dmytro Dudko (aka @yes_i_do_pixels) for environment art.