Hey, thanks a lot for your interest! Sorry for the late reply, we didn’t notice the last two messages.
It was a hard project for us but we learnt lots of things from it 
2 of 4 met at a summer internship in a local software company and they wrote the story during that summer, I was introduced to these 2 by a friend from college and the last one later joined us by reaching on LinkedIn.
Potentia is in Latin, it means energy. It is a fictional phase of matter. It is really hot like plasma phase but with different type of heat. We imagined majority of the people turned into this phase by an unknown weapon or force in the plot. (1st chapter). We did not took any reference from real world locations but we took inspiration from ordinary Western cities.
Yes, we released it last year. The release was not outstandingly successful but it gave us a chance to make one more shot
A Side Note, the main and side characters are from character customizer asset pack but we made lots of changes and customizations outside of the engine. Especially adding the scar was hard since the character was designed/uv’ed to use tiling textures like environment assets. I tried mesh decal and blending by 2nd UV channel methods. Latter worked really well.