Player Modifiers

This page is up to date (v1.2.2).

Player Modifiers are various bonuses and penalties that are received from a number of different sources such as Mastery, Equipment, Pets, and Agility obstacles.

Mechanics

Modifiers of the same kind stack additively. For example, if a player who has unlocked Ty (+3% Global Mastery XP) and is wearing an Ancient Ring of Mastery (+7% Global Mastery XP) will receive a total of +10% Global Mastery XP.

Any penalties are subtracted from bonuses of the same type to get the total modifier. For example, if the above player also constructs a Water Trap obstacle (-6% Global Mastery XP), their Global Mastery XP modifier will instead be +4%.

Additive vs Multiplicative

When describing how different bonuses stack, the terms 'additive' and 'multiplicative' are often used to explain how to combine them.

When two bonuses stack additively, the combined bonus is the sum of the first bonus and and the second bonus. For example, if a +10% bonus and a +20% bonus stack additively, the combined bonus will be +30%.

[math]\displaystyle{ \small{\begin{aligned} \text{Additive Bonus} = \text{Base Value} * (1 + (\text{Bonus 1} + \text{Bonus 2}) / 100)\end{aligned}} }[/math]

When two bonuses stack multiplicatively, the combined bonuses is instead

[math]\displaystyle{ \small{\begin{aligned} \text{Multiplicative Bonus} = \text{Base Value} * (1 + \text{Bonus 1} / 100) * (1 + \text{Bonus 2}/ 100) \end{aligned}} }[/math]

If the same +10% bonus and +20% bonus stack multiplicatively instead, the combined bonus will be +32%. If both bonuses are positive (or if both are negative) and they stack multiplicatively, the combined effect will be larger than if they stacked additively.

Combining Similar Modifiers

When multiple modifiers affect the same stat, they are usually applied additively. In particular, more specific versions of a bonus will stack additively with the global version of that bonus.

An example of this would be the Global Mastery XP and Skill Mastery XP modifiers, so a player wearing an Ancient Ring of Mastery (+7% Global Mastery XP) who also has reached the 10% Mastery Pool Checkpoint for Agility (+5% Agility Mastery XP) will receive a total of +15% Agility Mastery XP.

This also applies to combat modifiers of the same type such as Ranged Accuracy Rating and Global Accuracy Rating.

Nearly all buffs in the game stack additively.

List of Modifiers

The following list does not contain all possible bonuses, and although all of the below bonuses are defined in-game there may be some that are not currently in use.

Modifier	Example Text	Notes
Global Accuracy	+5% Accuracy Rating -5% Global Accuracy	Applies to the player's Accuracy Rating for all combat styles
Melee Accuracy Bonus	+5% Melee Accuracy Rating -5% Melee Accuracy Rating	Applies to the player's Melee Accuracy Rating
Ranged Accuracy Bonus	+5% Ranged Accuracy Rating -5% Ranged Accuracy Rating	Applies to the player's Ranged Accuracy Rating
Magic Accuracy Bonus	+5% Magic Accuracy Rating -5% Magic Accuracy Rating	Applies to the player's Magic Accuracy Rating
Melee Evasion	+5% Melee Evasion -5% Melee Evasion	Applies to the player's Melee Evasion Rating
Ranged Evasion	+5% Ranged Evasion -5% Ranged Evasion	Applies to the player's Ranged Evasion Rating
Magic Evasion	+5% Magic Evasion -5% Magic Evasion	Applies to the player's Magic Evasion Rating
Damage Reduction	+5% Damage Reduction -5% Damage Reduction	An additive bonus (or penalty) to the player's Damage Reduction.
Melee Strength Bonus	+5% Melee Strength Bonus from Equipment -5% Melee Strength Bonus from Equipment	Despite having the same name, this is different from the Melee Strength Bonus on equipment. Instead, this modifier directly applies to the player's Melee Max Hit.
Ranged Strength Bonus	+5% Ranged Strength Bonus from Equipment -5% Ranged Strength Bonus from Equipment	Despite having the same name, this is different from the Ranged Strength Bonus on equipment. Instead, this modifier directly applies to the player's Ranged Max Hit.
Magic Damage Bonus	+5% Magic Damage Bonus from Equipment -5% Magic Damage Bonus from Equipment	Despite having the same name, this is different from the Magic Damage Bonus on equipment. This modifier is combined multiplicatively with the Magic Damage Bonus on equipment as part of determining the player's Magic Max Hit
Max Hit Percent	+5% Maximum Hit -5% Maximum Hit	This modifier applies to the player's Max Hit. It is applied before Max Hit Flat and stacks multiplicatively with Melee Strength Bonus, Ranged Strength Bonus, and Magic Damage Bonus. Post-Roll Modifiers will still apply after damage is actually dealt, potentially amplifying the effect.
Max Hit Flat	+50 Maximum Hit -50 Maximum Hit	Directly increases or decreases the player's max hit by the listed amount and is applied after all other modifiers to max hit. Post-Roll Modifiers will still apply after damage is actually dealt, potentially amplifying the effect.
Damage to All Monsters	+5% Damage To All Monsters -5% Damage To All Monsters	A Post-Roll Modifier that increases the player's damage when attacking any monster. It stacks additively with any other applicable "Damage To..." modifiers.
Damage to Combat Area Monsters	+5% Damage To Combat Area Monsters -5% Damage To Combat Area Monsters	A Post-Roll Modifier that increases the player's damage when attacking monsters found in Combat Areas. It stacks additively with any other applicable "Damage To..." modifiers.
Damage to Slayer Monsters	+5% Damage To Slayer Area Monsters -5% Damage To Slayer Area Monsters	A Post-Roll Modifier that increases the player's damage when attacking monsters found in Slayer Areas. It stacks additively with any other applicable "Damage To..." modifiers.
Damage to Dungeon Monsters	+5% Damage To Dungeon Monsters -5% Damage To Dungeon Monsters	A Post-Roll Modifier that increases the player's damage when attacking monsters found in Dungeons. It stacks additively with any other applicable "Damage To..." modifiers. If fighting a monster also found in non-Dungeon areas, this modifier will not apply.
Damage to Slayer Tasks	+5% Damage To Slayer Tasks -5% Damage To Slayer Tasks	A Post-Roll Modifier that increases the player's damage when attacking their current Slayer Task. It stacks additively with any other applicable "Damage To..." modifiers. This modifier will apply if fighting the player's current slayer target in a dungeon, although it won't count towards completing the Slayer Task.
Monster Respawn Timer	-0.5s Monster Respawn Timer +0.5s Monster Respawn Timer	Adds or subtracts from the base 3 second timer to spawn a new monster.
Slayer Coins	+5% Slayer Coins -5% Slayer Coins	Affects how many Slayer Coins are received when killing monsters for the player's Slayer task.
GP From Monsters Flat	+5 GP From Monsters -5 GP From Monsters	Adds or subtracts from how much GP is received from killing a monster. Applied before (and thus boosted by) the GP Global and GP From Monsters modifiers.
GP From Thieving Flat	+5 GP From Thieving -5 GP From Thieving	Adds or subtracts from how much GP is received from Thieving. Applied before (and thus boosted by) the GP Global and GP From Thieving modifiers.
GP Global	+5% Global GP (except Item Sales) -5% Global GP (except Item Sales)	Affects how much GP is received from sources other than selling (including Item Alchemy). Stacks additively other non-flat GP modifiers.
GP From Monsters	+5% GP From Monsters -5% GP From Monsters	Affects how much GP is received from killing a monster. Stacks additively with the GP Global modifier.
GP From Thieving	+5% GP From Thieving -5% GP From Thieving	Affects how much GP is received from Thieving. Stacks additively with the GP Global modifier.
GP From Agility	+5% GP From Agility -5% GP From Agility	Affects how much GP is received from Agility. Stacks additively with the GP Global modifier.
Chance To Double Items Global	+5% Chance to Double Items Globally -5% Chance to Double Items Globally	Applies to the chance to receive twice as many items from any source, including all skills as well as monster drops. Stacks additively with Chance To Double Loot and Chance To Double Items Skill modifiers.
Chance To Double Loot Combat	+5% Chance To Double Loot in Combat -5% Chance To Double Loot in Combat	Applies to the chance to receive twice as many items from monster drops, including bones and chests from Dungeons. Stacks additively with Chance To Double Items Global
Chance To Double Items Skill	+5% Chance to Double Items in Thieving -5% Chance to Double Items in Thieving	Applies to the chance to receive twice as many items from the listed skill. Stacks additively with Chance To Double Items Global.