@Patroklos nice to meet you - Also working on a dark/ gritty themed story - and subbed to yours hope you check mines out too 
we have similar themes except in my case those are on the spoiler side XD
Spoiler Themes
Gods, Demons Cosmic Horror. It is inspired by Ancient Concepts of Frequency (sound) used to achieve inhuman feats, and raise human consciousness. The mythos in this story is that the Gods of ancient times gained their abilities by exposing themselves to specific frequencies.

There is a BL subplot for two couples although the focus is survival horror, battle royale and
The class of superhumans in this story have special abilities that go from gross, gritty to creepy. All superhumans are carriers of a 'virus' that instantly turn others nearby into mindless, zombie-like creatures which soon causes an epidemic.
The story follows two brothers (Evan, Owen) and an ex-assassin (Xun), three heroes abilities are based on Solid, Gas, Liquid. Rescuing survivors becomes a balancing act for them as they can easily infect them. Meanwhile a handful of superhumans are caught in a game of 'battle royale', infecting what remains of the population along the way.
Evan (below) can calcify his saliva to make various melee weapons

This project started as a beat 'em up, survival horror video game so it continues to echo that vibe
