This looks like a mod for STALKER. Even the local nemesis is called Black Stalker 😬
We play as profressor Igor, who’s searching for his wife, Tatyana.
Or, more precisely, he searches for a material called chernobylite, which can be found, obviously, in Chernobyl.
As gameplay goes, we have a Geiger counter that also can highlight pickable items. And there is a lot of junk to collect.
Every day you pick an area for your and your teammates to investigate. Teammates just return with some resources, but you on the other hand can investigate points of interest and trade with NPCs.
Weapon modification system is surprisingly serious. With pros and cons for different upgrades, and visual queues.
One bit I was generally impressed by is the leveling up system. Instead of just picking a skill, you actually get to do a small training mission before you can acquire each of them. For silent takedown, for example, you have to sneak up on your teacher.
There are some pretty obvious references. Like the device that can detect object history based on radiation that the professor was developing was called Ariadne. And when searching for clues to find his wife he speaks of “pulling the thread”.
Another character talks about Rat King and leaves a ballerina music box as a clue, a reference to Nutcracker.