Ghost Recon Online isn't the game that you used to know; Ubisoft just announced that the free-to-play tactical shooter officially launched today and with it came the name change. Now known as Ghost Recon Phantoms, the game welcomed quite a few changes with the 1.0 patch, including new character looks, weapon updates, a graphical overhaul for the maps (including lighting), optimized matchmaking and more. You can check all the changes here.
Ghost Recon Phantoms can be played for free here.