Some recent examples are a daylight shooting of a former Chechen Rebel commander in Berlin [1], Shapoval's death by carbomb in Kiyv [2], and of course, Litvinenko's Polonium poisoning in London [3]. Glukhovsky is wise in not announcing where he is.
These are not very recent and quite a few of the attacks went wrong with surviving victims and caught perpetrators.
The Russian omnipresent assassination machine is as much a myth as its invincible military.
That said, the West keeps playing as if there's no hostile power trying to infiltrate everything it can, 30-50yo Russian males with unexplained biography gaps or no background checks at all still allowed to travel freely, establish businesses with sketchy financials and so on.
Apart from the fact that Russia is not the only hostile power trying to infiltrate Western organizations, I find the premise incredibly sexist, as if men are presumably more likely to be foreign agents than women.
You'll find that all of Russian secret services are extremely sexist. GRU only recruits from commanding officers in active duty, and these are almost 100% male. FSB does use women, mostly for honeypot purposes.
And yes, I agree that Chinese nationals are to be treated with way more suspicion as well. Anyone with relatives in China can be pushed to do whatever CCP needs. Also everyone with official links to the CCP should be under 24/7 monitoring, something something "covert police stations" and Confucius Institute.
He's an author, not a game dev. The game devs licensed his IP. All of this is explained in the article.
You might also be surprised to learn that Andrei Tarkovsky, director of the film Stalker (1979), didn't personally learn C++ and program S.T.A.L.K.E.R. (2007). Neither did Arkady and Boris Strugatsky who wrote the novel Roadside Picnic (1971) that all of these works, including Metro, are inspired by.