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- "Aggressive" redirects here. For the attack style, see this article.
A player is attacked by two aggressive ogresses.
Aggressiveness refers to the behaviours of various monsters in RuneScape when in close promixity to players. Aggressive monsters will attack players; some are aggressive based on players' combat levels and others are aggressive regardless of level. Aggressive monsters can be particularly dangerous in a multi-combat area with multiple monsters. Non-aggressive, or passive, monsters will not attack players unless they are attacked first.
Some monsters, such as Chompies & Jubblies, will not attack a player even if engaged in combat.
When aggressiveness is based on combat level, an aggressive monster will attack a player whose combat level less than or equal to twice the monster's level. If the player's level is more than twice the monster's level, it won't attack.
For example, a level 51 player enters an area with a level 28 Hobgoblin. Since the player's level is less than twice the monster's level (28 × 2 = 56, which is more than 51), the hobgoblin will attack the player. Conversely, if a level 105 player enters an area with a level 28 hobgoblin, the monster will not attack because the player's level is more than twice the monster's. In this case, the hobgoblin will ignore the player (unless, of course, the player decides to attack the monster). The player would need to be level 57 or higher to avoid being attacked by the hobgoblin.
Different monsters seem to have different levels of aggression; some, such as Jungle horrors, will seek you out from many spaces away, whereas others, such as Mountain trolls, are aggressive on a smaller radius.
- After a player spends a certain amount of time (about 10–20 minutes) in the vicinity of aggressive monsters, the monsters will become tolerant of the player and become passive. If the player leaves the area and then returns, the monsters there are aggressive again. This includes Random events that teleport players from the area and then return them. Note that logging out is not classed as leaving the area, so if a player logs out and logs back in again the monsters will still be tolerant.
- Some monsters that become tolerant may become aggressive again, after a period of time, even if the player constantly stays in the vicinity. For example, Flesh crawlers in the Stronghold of Security and Kurasks in the Fremennik Slayer Dungeon are this way. Other monsters do not spontaneously become aggressive again no matter how long the player remains in the vicinity.
- Most monsters in the Wilderness are aggressive no matter what your level. A few, such as Rogues, are not aggressive.
- Revenants are always aggressive, so long as they are within your level range (Combat level ± Wilderness level), otherwise, they ignore you. They are also aggressive from a very long range, seeking you out from even outside your screen width.
- Some monsters in the Stronghold of Security are aggressive to any player. These include Flesh Crawlers, level 50 Giant Spiders, and level 37 and 59 scorpions.
- Aggressive monsters with a combat level of at least 69 are also aggressive to any player, as 138 is double this, and it is impossible for player to have a combat level higher than 138.
- Most Slayer creatures are non-aggressive, despite the player's combat level. This does not apply to all however, as Kurasks, Gargoyles, Warped terrorbirds, and Aberrant Spectres (in the Slayer Tower) are aggressive.
- Desert Bandits south of Bebadin Camp will always be aggressive to players wearing Saradomin and Zamorak items.
- Desert Bandits (to players not wearing Saradomin or Zamorak items) and Al Kharid Warriors are both non-aggressive until a player attacks one. All of the other warriors or bandits in the vicinity will then attack that player because both areas are multi-combat.