Actually it is the 2 nd most popular MMO , and has been ever since it launched . However FFXIV used to be close behind , but now the gap has increased ESO had a very good year . 1 . ESO sold 7 mil copies in 2 years , while FFXIV and GW 2 sold 5 mil in double that time . 2 . Even though a majority of ESO ' s players never bought it on Steam , and FFXIV used to be only 10 $ for the last 2 years , ESO still managed to easily outsell FFXIV there . See SteamSpy . 3 . On PS 4 it ' s pretty much the same . As far as MMOs go , ESO has easily outsold FFXIV , and is still dominating there . ESO optional subscription has been among the bestselling addons each month since it launched . 4 . On Xbox 1 ESO doesn ' t really have any competition , apart from Neverwinter , and that game is just not good enough to compete . 5 . For more popularity contest , you can even search Google Trends , and you ' ll see that ESO is indeed the # 2 most searched MMO on Google .