A sequel to Bethesda's wildly popular game Fallout Shelter is coming later this month, though odds are you won't be able to play it. Fallout Shelter Online, which expands on the world of the original title by adding new multiplayer capabilities, will only be available in China -- at least for the time being, according to PC Gamer. Engadget has reached out to Bethesda for additional details and will update this post if we hear back.