An adventure is a voyage, mission, or other task in which the player characters are the heroes working together toward a goal. An adventure consists of a series of encounters. A variety of combat encounters and noncombat encounters is recommended to encourage problem solving and give all types of characters an opportunity to shine. An adventure may take a single play session to complete, or span multiple play sessions. One or more adventures tied together by an overall story arc make up a campaign. A number of published adventures are available. Adventures can also be taken from Adventure Paths and campaigns, or a Dungeon Master can create a homebrew adventure to run.