As reported by [rockpapershotgun]:

The developer Remote Games have set up a real world scale model of Chernobyl and filled it with RC cars connected to the internet, players can connect to these vehicles with the goal of collecting "Isotopes" from containers littering the arena, solving puzzles, engage in contests, quests, and exploring the city of Pripyat. You only get a small amount of time, about 1 minute, but can pay for additional time, with planned features such as upgrading to bigger robots, unlocking secret doors, and capturing territory.

Its a rather unusual "video game" as its played with real world vehicles in a real world scale model, its free to play, at least until you run out of isotopes which cost around 9$ for an hours worth, but seems like a pretty unique project. There's a video of the gameplay [here].