Destiny‍'​s style has been described as a first-person shooter that incorporates role-playing and massively multiplayer online game (MMO) elements, but Bungie has avoided defining Destiny as a traditional MMO game. Instead, the game has been referred to as a "shared-world shooter", as it lacks many of the characteristics of a traditional MMO game. For instance, rather than players being able to see and interact with all other players in the game or on a particular server—as is the case in many conventional MMO games—Destiny includes on-the-fly matchmaking that allows players to see and interact only with other players with whom they are "matched" by the game. Time-limited events and modes are also occasionally added or featured in-game.