Players take on the role of a Guardian, defenders of Earth's last safe city, as they wield a power called Light to protect the city from different alien races. The Guardians are tasked with reviving a celestial being called the Traveler, while journeying to different planets to investigate and destroy the alien threats before humanity is completely wiped out. Since launch, Bungie has released three expansion packs furthering the story and adding new content: The Dark Below in December 2014, House of Wolves in May 2015, and The Taken King in September 2015, which marked the beginning of year two of Destiny and changed a lot of the core gameplay.
*Category ratings conditional upon familiarity with MMO's. Pacing & Replay are impossible to answer due to the nature of the game.