https://www.gamespot.com/articles/rainbow-six-sieges-astonishing-comeback/1100-6455698/

In December of 2015, Ubisoft Montreal's Rainbow Six Siege released to little fanfare. It was a good game, but it relied too heavily on multiplayer modes for many players, its map supply was sparse, and servers weren't always reliable. All in all, it was a mediocre release.

Cut to two years later, and it's hard to believe we've been playing the same game. Ubisoft Montreal has supported its multiplayer shooter throughout the past 24 months, adding content, revamping servers, and listening to player feedback. The player count has increased exponentially, reaching 25 million with the recent release of Operation White Noise, the last content drop of Siege's second year.