Paintball can be played indoors or outdoors, on fields specifically made for the game. The field is scattered with natural or artificial obstacles and terrain, which players use to hide behind. The objective can vary according to the type of game being played. Players may have to capture a flag held by the opposing team, defend or capture a particular point on the field, or simply eliminate all other players on the field until they are the only player or team remaining. Depending on the variant played, games can last from seconds to hours.