NPCs populate the realm of Gielinor
Some NPCs, such as shopkeepers and some characters in quests, are unavailable for combat. However, most NPCs can be attacked and these are generally referred to as monsters. Each type of monster has its own strengths and weaknesses. Demons, for example, have a weak defence against magical attacks, while most dragons have extremely high defence against magic. Monsters may either be aggressive or non-aggressive. Non-aggressive monsters ignore players unless attacked, while aggressive monsters may attack all players or may only attack players with combat levels below a specified level, Runescape Gold depending on the circumstances or location. This can make certain areas throughout Gielinor dangerous or inconvenient to players with lower combat levels.