Overview
In the most general sense, a quest is a "hunt for a specific outcome", in contrast to simply winning a game. Typical quests involve killing a set number of creatures or collecting a list of specific items. Some quests may take only a few minutes or hours to complete, while others may take several days or weeks. Often, the larger the reward, the longer the quest takes to finish, and it is common for a quest to require characters to have met a certain set of pre-conditions before they are allowed to begin.
Questing is a tool used in role-playing games to avoid putting players in a position where they only perform a repetitive action such as killing creatures. Players may be performing this activity in order to gain new skills and progress to new areas, or in-game money in order to buy new items such as armour and equipment. This process, commonly known as "grinding", can slow down a character's progression in the game and ultimately limit the player's enjoyment. Having a number of quests for characters to tackle is seen as a way to provide variety and to counter the need to grind in these types of games.
A side-quest is an optional section of a video game, and is commonly found in role-playing video game. It is a smaller mission within a larger storyline, and can be used as a means to provide non-linear structures to an otherwise linear plot. As a general rule, the completion of side-quests are not essential for the game to be finished, but can bring various benefits to the player characters.
Read more about this topic: Quest (video Gaming)