ATOM RPG like other users said. A very faithful (sometimes too faithful tbh imo) spiritual successor to Fallout 1/2 except set in the USSR. I highly recommend it if you are into Fallout style CRPGs. As in, you can recruit followers but you don't directly control them in combat, charisma/speech can have a huge impact on how some conflicts are solved, you get Action Points to use every turn, overworld traveling with random encounters, cultural references and silly bits even to a detriment (just like Fallout!), etc.

It's the closest thing to a Fallout remake but in 3d and some (only some) modernizations.

Atom RPG, it's very falloutesque (Fallout 1 and 2 more than the others), but set in Russia

Pretty good game, but very weird and the translation was wonky as hell when I played several years ago

ATOM RPG