Boss
A boss is a powerful, usually unique monster that is fought to accomplish an objective, be it the advancement or minigame, or as part of a team player-versus-monster event. Some monsters commonly referred to as bosses are powerful monsters that reside in multi-combat areas; these monsters are commonly fought by teams of players in search of highly valuable drops. Many bosses have extremely high combat levels, and most of the strongest monsters in the game are bosses. With the exception of Bryophyta and Obor, bosses are exclusive to members.
Dwarf multicannons often cannot be set up in the areas of many bosses. Others may have different restrictions; for example, Prayer cannot be used during the fights with the final bosses of Recipe for Disaster.
Most bosses (e.g. bosses like the Corporeal Beast) also reside in a multi-way area; very few reside in single-way areas or instances. Most bosses will also generate a message upon kill telling the player what drop(s) they have obtained. For example, if players are at General Graardor and kill him (and drops Bandos tassets), a message will appear in the game box saying "Player name received item: Bandos tassets".
List of bosses
Slayer bosses
Bosses in this category require a Slayer task either to the boss itself or the creature equivalent in order to be fought.
| Name | Image | Level | Hitpoints | Attack style | Location | Slayer requirement | Unique drops |
|---|---|---|---|---|---|---|---|
| Grotesque Guardians |
  |
Dusk: 248 Dawn: 228 |
450 (Each) | Melee (stab), Ranged, Magic | Slayer Tower | 75 |  Granite gloves Granite ring Granite hammer Black tourmaline core Jar of stone
|
| Abyssal Sire |  |
350 | 400 | Melee | Abyssal Nexus | 85 |  Unsired Jar of miasma
|
| Kraken |  |
291 | 255 | Typeless Magic | Kraken Cove | 87 |  Kraken tentacle Trident of the seas Jar of dirt
|
| Cerberus |  |
318 | 600 | Melee (stab), Ranged, Magic | Cerberus' Lair | 91 |  Primordial crystal Pegasian crystal Eternal crystal Jar of souls
|
| Thermonuclear smoke devil |  |
301 | 240 | Typeless magical ranged | Smoke Devil Dungeon | 93 |  Smoke battlestaff Occult necklace Jar of smoke
|
| Alchemical Hydra |  |
426 | 1100 | Ranged, magic | Karuulm Slayer Dungeon | 95 |  Hydra leather Hydra's claw Alchemical hydra heads Jar of chemicals
|