It sold over US$325 million at retail in its first five days, making it the biggest new franchise launch of all time. It was GamesRadar's 2014 Game of the Year and it received the BAFTA Award for Best Game at the 2014 British Academy Video Games Awards. "Destiny"s style has been described as a first-person shooter that incorporates role-playing and MMO elements, but Bungie has avoided describing "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 communicate 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 communicate only with other players with whom they are "matched" by the game. To communicate with other players in the game world, players must use their respective console's messaging system. Time-limited events and modes are also occasionally added or featured in-game. Activities in "Destiny" are divided among player versus environment (PvE) and player versus player (PvP) game types across the Cosmodrome and the Plaguelands (added with "Rise of Iron") on Earth, its Moon, Venus, and Mars. There are also PvP maps for Mars's moon Phobos and the planet Mercury. A social space on Mercury was added with the "House of Wolves" expansion, but requires players to go undefeated in the Trials of Osiris Crucible mode in order to access it. Another PvE area, a massive ship called the Dreadnaught that is situated in the rings of Saturn, and two PvE missions on Phobos were added with "The Taken King" expansion. Players are able to improve their characters, referred to as Guardians, by gaining experience points (EXP) — when a set number of experience points are accumulated, the player's character will "level up" and gain improved statistics which further enhance performance in battle. Quests, including the "main scenario" quest line, are specific tasks given to the player by non-player characters which reward items and EXP. Completing main scenario quests progresses the overarching plot of the game. "Destiny" features three character classes. Each class has their own specific upgrades, perks, special abilities, and three sub-classes that allow the player to finely tune their individual characters to provide a different play style.