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'''Level Difference Penalty''' or '''Level Differential Correction''' or '''Level Difference Adjustment''' happens when a player is in combat against an enemy two or more levels<ref>" Level differential corrections will now be made when an enemy is two levels higher than the player, and will mirror those previously made when an enemy was one level higher than a player." - March 2013 Version Update https://forum.square-enix.com/ffxi/threads/31310-March-27-2013-(JST)-Version-Update</ref> above them, and the player's abilities have a reduced effect based on the level differential. This [[:Category:Game Mechanics|combat mechanic]] exists in many pre-[[Seekers of Adoulin|Adoulin]] areas, but has started to be removed on a zone by zone basis where newer [[:Category:Battle Systems|battle content]] such as [[:Category:The Voracious Resurgence Missions|The Voracious Resurgence Missions]] are located.

* Level Difference Penalty is colloquially referred to as '''Level Correction''', however that term can also refer to generic '''Coefficient''' modifiers written as '''α''' (alpha), when the coefficient represents a level scaling modifier. Examples include [[:Category:Blood Pact|Blood Pact]] damage, [[:Category:Blue Magic|Blue Magic]] damage, and [[Defense]]. Though '''Level Correction''' is generally understood to refer to Level Difference Penalty.

Examples:

The level differential between a level 95 monster and level 85 player would be (85 + 1 - 95) = -9 or a differential of 9.

The level differential between a level 86 monster and level 85 player would be (85 + 1 - 86) = 0 or no differential.

==Stats Affected==
* The Level Difference Penalty adjusts the outcome of functions that are based on the difference between the player's and enemy's stats.
** It's unclear whether the higher level combatant receives a buff or the lower level combatant receives a penalty but based on Matsui's version update notes coining the term as a penalty it's thought to be the latter.
* Higher level players also receive an advantage against lower level enemies.
** Lower level monsters appear to have lower attack ratios against higher level players.
** The opposite isn't confirmed, monsters don't appear to have lowered defense or evasion when fighting higher level players. {{Information Needed}}
* Your level determines the cap of your [[:Category:Combat Skills|Combat Skill ratings]] which affects basic parameters like [[Accuracy]], [[Attack]], and [[Evasion]], but also parameters like [[Shield Skill|Shield block rate]] and [[Spell Interruption Rate]]. It would only be considered a level difference penalty if there's an extra modifier that skill ratings and stats don't account for.
* Appears to be in place to hamper power leveling through high-end equipment or temporary effects.
** As such, your level has a more significant impact than any individual food, equipment, merit, vorseal, or buff in the affected zones.
** The difference can be verified in areas like Abyssea, where a lower-level player can use [[:Category:Abyssea Atma|Atmas]] to boost their attributes to the same amount as a higher-level player, but they won't be as successful in combat against the same enemies.

{| class="wikitable sortable"
|+ Level Difference Penalty Effects
|-
! Attribute !! Rate
|-
| [[pDIF]] - Atk Penalty || Reduces [[Attack]] and physical damage limit<ref>pDIF tests find low results and predict ratio is capped before level correction https://www.bluegartr.com/threads/Yuki-Gekko-Kasha-Attack-bonus-Testing (Nameless, BG Forums) Jan 14, 2009 https://www.bluegartr.com/threads/68018-Yuki-Gekko-Kasha-Attack-bonus-Testing?p=2453980&viewfull=1#post2453980</ref><ref>Estimates to attack/defense ratio pDIF cap raised in 2016 (Byrthnoth, BG Forums) Feb 23, 2016 https://www.bluegartr.com/threads/127523-pDIF-Changes-(Feb-10th-2016)?p=6643054&viewfull=1#post6643054</ref>: -5% Melee pDIF per level -2.5% Ranged pDIF per level
|-
| [[pDIF]] - Def Penalty || Reduces the effect of [[Defense]] and lowers the Defense cap. Monsters don't have a physical damage limit increase: Monsters have a flat pDIF qRatio cap of 4.0, even critical hits can't exceed 4.0.
|-
| [[Hit Rate]] || -2% Hit Rate per level -2% Evasion Rate per level
|-
| [[Magic Hit Rate]] / [[Resist|Resist Rate]]|| -4 [[Magic Accuracy]] per level (estimated) {{Information Needed}} -4 [[Magic Evasion]] per level (estimated) {{Information Needed}}
|-
| [[Spell Interruption Rate]] || Activation rate adjustment unclear. {{Information Needed}}
|-
| [[Intimidate|Intimidation Rate]] || [[:Category:Killer Effects|Killer Effects]] activation rate adjustment unclear. {{Information Needed}}
|}

==Zones Without Level Difference Penalty==
{| class="wikitable sortable"
|+ Zones Without Level Correction <ref>FF11 Glossary - ''Reberu Sahosei'' https://wiki.ffo.jp/html/2794.html</ref>
|-
! Zone(s) !! Content Introduced !! Version Update
|-
| [[:Category:East Ulbuka Territory|East Ulbuka Territory]] || [[Seekers of Adoulin]] || March 27, 2013 <ref>https://forum.square-enix.com/ffxi/threads/31310-March-27-2013-%28JST%29-Version-Update</ref>
|-
| [[Escha - Zi'Tah]] || [[:Category:Rhapsodies of Vanadiel Missions|Rhapsodies of Vanadiel Missions]] Ch. 1 || May 14, 2015 <ref>https://forum.square-enix.com/ffxi/threads/46976-May-14-2015-%28JST%29-Version-Update</ref>
|-
| [[Escha - Ru'Aun]] || [[:Category:Rhapsodies of Vanadiel Missions|Rhapsodies of Vanadiel Missions]] Ch. 2 || Aug 5, 2015 <ref>https://forum.square-enix.com/ffxi/threads/47901-Aug-5-2015-%28JST%29-Version-Update</ref>
|-
| [[Reisenjima]] || [[:Category:Rhapsodies of Vanadiel Missions|Rhapsodies of Vanadiel Missions]] Ch. 3 || Nov 10, 2015 <ref>https://forum.square-enix.com/ffxi/threads/49065-Nov-10-2015-%28JST%29-Version-Update</ref>
|-
| [[Maquette Abdhaljs-Legion]] || [[:Category:Ambuscade|Ambuscade]], [[:Category:Legion|Legion]]|| Apr 5, 2016 <ref>https://forum.square-enix.com/ffxi/threads/50256-Apr.-5-2016-%28JST%29-Version-Update</ref>
|-
| [[Walk of Echoes|Walk of Echoes [P]]] || [[:Category:High-Tier_Mission_Battlefields#Avatar_Prime_Fights|High Tier Avatar Battlefields]], [[:Category:High-Tier_Mission_Battlefields#Avatar_Prime_Fights|High Tier Mission Battlefields]], [[:Category:Odyssey|Odyssey]] || Jun 10, 2019<ref>https://forum.square-enix.com/ffxi/threads/55525-June.-10-2019-%28JST%29-Version-Update</ref>
|-
| [[Wajaom Woodlands]] || rowspan=3 | [[:Category:Records_of_Eminence#RoE_Quests_4|Peculiar Foes I-III]], [[:Category:The Voracious Resurgence Missions|The Voracious Resurgence Missions]] Pt. 4 || rowspan=3 | Jun 10, 2021 <ref>https://forum.square-enix.com/ffxi/threads/58218-June-10-2021-%28JST%29-Version-Update</ref>
|-
| [[Mount Zhayolm]]
|-
| [[Caedarva Mire]]
|-
| [[Beaucedine Glacier]] || rowspan=4 | [[:Category:Records_of_Eminence#RoE_Quests_4|Peculiar Foes IV-V]], [[:Category:The Voracious Resurgence Missions|The Voracious Resurgence Missions]] Pt. 5 || rowspan=4 | Sep 10, 2021 <ref>https://forum.square-enix.com/ffxi/threads/58580-September-10-2021-%28JST%29-Version-Update</ref>
|-
| [[Palborough Mines]]
|-
| [[Alzadaal Undersea Ruins]]
|-
| [[Arrapago Reef]]
|-
| [[Aydeewa Subterrane]] || [[:Category:Records_of_Eminence#RoE_Quests_4|Peculiar Foes VI]], [[:Category:The Voracious Resurgence Missions|The Voracious Resurgence Missions]] Pt. 5 || Dec 10, 2021 <ref>https://forum.square-enix.com/ffxi/threads/58927-December-10-2021-%28JST%29-Version-Update</ref>
|-
| [[Quicksand Caves]] || [[:Category:The Voracious Resurgence Missions|The Voracious Resurgence Missions]] Pt. 6 || Feb 10, 2022 <ref>https://forum.square-enix.com/ffxi/threads/59174-February-10-2022-%28JST%29-Version-Update</ref>
|-
| [[Crawlers' Nest (S)]] || Opened Crawlers' basement as [[:Category:Apex Monster|Apex Monster]] area. || rowspan=2 | Mar 20, 2022<ref>https://forum.square-enix.com/ffxi/threads/59264-March-10-2022-%28JST%29-Version-Update</ref>
|-
| [[Western Altepa Desert]] || [[:Category:Records_of_Eminence#RoE_Quests_4|Peculiar Foes IX]], [[:Category:The Voracious Resurgence Missions|The Voracious Resurgence Missions]] Pt. 7-1 (postponed to Apr)
|-
| [[Batallia Downs]] || [[:Category:Records_of_Eminence#RoE_Quests_4|Peculiar Foes X]], [[:Category:The Voracious Resurgence Missions|The Voracious Resurgence Missions]] Pt. 7-2 || May 10, 2022 <ref>https://forum.square-enix.com/ffxi/threads/59453-May-10-2022-%28JST%29-Version-Update</ref>
|-
| [[The Eldieme Necropolis (S)]] || rowspan=2 | [[:Category:Records_of_Eminence#RoE_Quests_4|Peculiar Foes XI-XII]], [[:Category:The Voracious Resurgence Missions|The Voracious Resurgence Missions]] Pt. 8 || rowspan=2 | Jun 10, 2022 <ref>https://forum.square-enix.com/ffxi/threads/59579-June-10-2022-%28JST%29-Version-Update</ref>
|-
| [[Qufim Island]]
|-
| [[Bhaflau Thickets]] || [[:Category:Apex Monster#Locus_Monsters|Locus monsters]] || Jul 11, 2022 <ref>https://forum.square-enix.com/ffxi/threads/59693-July-11-2022-%28JST%29-Version-Update</ref>
|-
| [[King Ranperre's Tomb]] || [[:Category:Apex Monster#Locus_Monsters|Locus monsters]] || Sep 12, 2022 <ref>https://forum.square-enix.com/ffxi/threads/59917-September-12-2022-%28JST%29-Version-Update</ref>
|-
| [[Bibiki Bay]] || [[:Category:Apex Monster#Locus_Monsters|Locus monsters]] || rowspan=2 | Nov 10, 2022 <ref>https://forum.square-enix.com/ffxi/threads/60130-November-10-2022-%28JST%29-Version-Update</ref>
|-
| [[Mine Shaft 2716|Mine Shaft #2716]] || [[:Category:Records_of_Eminence#RoE_Quests_4|Peculiar Foes X]], [[:Category:The Voracious Resurgence Missions|The Voracious Resurgence Missions]] Pt. 10-1
|-
| [[Throne Room]] || [[:Category:The Voracious Resurgence Missions|The Voracious Resurgence Missions]] Pt. 10-2 (Postponed to Jan) || Dec 12, 2022 <ref>https://forum.square-enix.com/ffxi/threads/60225-December-12-2022-%28JST%29-Version-Update</ref>
|-
| [[Xarcabard]] || rowspan=2 | [[:Category:Records_of_Eminence#RoE_Quests_4|Peculiar Foes XIV-XV]] || rowspan=2 | Feb 10, 2022 <ref>https://forum.square-enix.com/ffxi/threads/60429-February-10-2023-%28JST%29-Version-Update</ref>
|-
| {{H:text|English version update notes incorrectly state 'Oldton' Movalpolos was adjusted|Newton}} [[Newton Movalpolos|Movalpolos]] <ref>https://forum.square-enix.com/ffxi/threads/60428-2023.02.10%E3%83%90%E3%83%BC%E3%82%B8%E3%83%A7%E3%83%B3%E3%82%A2%E3%83%83%E3%83%97%E6%83%85%E5%A0%B1</ref>
|-
| [[Everbloom Hollow]] || [[:Category:The Voracious Resurgence Missions|The Voracious Resurgence Missions]] Pt. 11 || Mar 10, 2023 <ref>https://forum.square-enix.com/ffxi/threads/60553-March-10-2023-%28JST%29-Version-Update</ref>
|-
| [[The Celestial Nexus]] || [[Crystal Paradise (Battlefield)]] || Sep 11, 2023<ref>https://forum.square-enix.com/ffxi/threads/61097-September-11-2023-%28JST%29-Version-Update</ref>
|-
| [[Al Zahbi]] || Increased [[:Category:Besieged|Besieged]] content level (Postponed to future update) || Jun 10, 2024 <ref>https://forum.square-enix.com/ffxi/threads/61799</ref>
|}

==Content Level==
* In zones that have a Level Difference Penalty where Content Level 100+ is implemented, the penalty is negated by making the NM level 99 and adding bonus stats to resemble the content level similar to level 99 players wearing item level equipment.
* Even if the zone was changed to have the level difference penalty removed, previous content in the zone isn't readjusted by default.
** Example: [[:Category:Unity Concord|UNM]] [[Lumber Jill]] in [[Batallia Downs]] is still level 99 after zone updates for [[:Category:The Voracious Resurgence Missions|Voracious Resurgence Missions]].
* At level 50 and above, [[Enmity]] against higher level enemies is reduced.
* Against level 99 enemies with large HP values, players can't take advantage of the reduced enmity specification and hit the enmity cap. <ref>"Enmity will now decrease based on the gap between player/pet level/item level and monster level. Abilities that generate a fixed amount of enmity, such as healing magic and elemental magic, are exempt from this change." - March 26 2015 Version Update https://forum.square-enix.com/ffxi/threads/46531-Mar-26-2015-%28JST%29-Version-Update</ref>
* The [[Peach Power]] battlefield in [[The Ashu Talif]] had a level difference adjustment issue, but an update states this has been corrected.<ref>"The issue wherein a level difference adjustment was applied to the [[Peach Power]] battlefield. In accordance with this change, the monster stats have also been adjusted."https://forum.square-enix.com/ffxi/threads/61297-December-11-2023-%28JST%29-Version-Update</ref>
** This update is expected to have no impact on the difficulty of the battlefield.

==Ability Interaction==
* Certain abilities have a potency or success rate influenced by level difference.
* {{ItemIcon|Attuner|22}} {{tooltip|text=[[Attuner]]|tooltip=[[File:Attuner description.png]]}}, {{ItemIcon|Target Marker|22}} {{tooltip|text=[[Target Marker]]|tooltip=[[File:Target Marker description.png]]}} - Automaton Attachments
** Was considered to be effective against HNM-class enemies above, otherwise compare to {{ItemIcon|Ten. Spring V|22}} {{tooltip|text=[[Ten. Spring V|Tension Spring]]|tooltip=[[File:Ten. Spring V description.png]]}}, {{ItemIcon|Stabilizer V|22}} {{tooltip|text=[[Stabilizer V|Stabilizer]]|tooltip=[[File:Stabilizer V description.png]]}}.
** Adjustments were made to allow this attachment to function in content like UNM and [[HTMB]] <ref>"Attuner... Target Markers: This attachment will function properly in high-tier battlefields and Wanted battles." Jan 15 2015 Version Update https://forum.square-enix.com/ffxi/threads/45721-Jan-15-2015-%28JST%29-Version-Update</ref>
* [[Flashy Shot]] - RNG ability
** Adjustments were made to allow this ability to function in UNM and HTMB content in June 25, 2015 Version Update <ref>"The ability no longer ignores level difference penalties. Instead, a bonus to range accuracy and damage is granted based on the level difference between the target and the player." June 25, 2015 Version Update https://forum.square-enix.com/ffxi/threads/47481-Jun-25-2015-%28JST%29-Version-Update</ref>
* [[Charm]] - BST ability
* [[:Category:Treasure Coffer#Opening_a_Coffer_as_Thief|Lockpicking Tools]] THF ability
** Based on a dungeon level instead of an enemy level.
** Impacts severity of traps.
* Activation rate of additional effects on weapons can be affected by level difference.
** [[Dainslaif]] is an example of an item with 100% activation on lower level enemies, but is unreliable on higher level enemies.

==Post 2016 Level Correction Testing==
*<ref>Bolmster, FFXIAH https://www.ffxiah.com/forum/topic/57989/post-2016-level-correction-testing/</ref>

==References==
<References/>
[[Category:Game Mechanics]]

Level Difference Penalty - Revision history

imported>Spicyryan: add testing reference