Chronicles are large-scale updates to Lineage II done every half a year. They are free expansions to the game that every subscriber must download in the form of a patch. As the "Chronicles" advance, a new story develops. There are major game alterations in each new Chronicle, and the game balance has greatly changed in every case so far. Each chronicle also adds a great deal of new content to the game, including new skills, quests, areas and items; some chronicles also increased the level cap.
Saga 1: The Chaotic Chronicle
Prelude
Lineage II went live in North America on April 27, 2004. All open beta players were required to purchase a copy of Lineage II to obtain a CD key to activate their previously used account. The purchase included the payment for the first month of gameplay. Prelude was the first time a monthly fee of $15 was charged.
There was no change in game mechanics between open beta and prelude.
Chronicle 1 : Harbingers of War
Released June 29, 2004 Chronicle 1: Harbingers of War added stirring castle sieges, new fierce monsters, items and quests, and a significantly expanded 3D world. Among the many new quests available to players is the Audience with the Land Dragon quest, which results in a showdown with the massive Land Dragon, Antharas.  Many of the new quests are designed to challenge higher level players, in particular. Also featured in Chronicle 1 are dozens of new weapons and skills for players to obtain. Clan housing was added, where clans can bid on clan halls through an auction system. Additionally, player and creature movement speeds were increased and new PvP arenas were added.
Chronicle 2 : Age of Splendor
In Chronicle 1, when a clan successfully won a castle siege, there was not much gained from it other than reputation and pride. After Chronicle 2 was released December 8, 2004, a manor system was added. New parts of the map were added as well, such as the water city of Heine, Devastated Castle, Tower of Insolence, the castle of Innadril, the Aden Coliseum, Alligator Island, Field of Whispers, Field of Silence, and others.
Chronicle 3 : Rise of Darkness
With Chronicle 3 released May 2005, came a new twist to the L2 universe called the Seven Signs. The idea behind this twist is to pit two factions (Dusk & Dawn) against one another in a competition for Seals. This competition is voluntary but not joining may hinder progress later in the game (when one is a high level player). Seal stones are items dropped by mobs that, when turned in, will give players Ancient Adena. Ancient Adena is another level of the Economy in L2 and allows players to purchase items they would not normally have access to.
The addition of the Seven Signs competition also brought a large number of dungeons across Aden called Catacombs and Necropolises, that only participants in the competition can access. For one week, players compete for and turn in as many seal stones as they can. When dawn wins, the sky turns light blue and the moon gets a giant closed blue eye; When dusk wins, the sky turns red and the moon gets a giant open red eye. Winners are given exclusive access to the Catacombs/Necropolis and the losing side will be locked out for one week. During this period, players can also exchange their seal stones for Ancient Adena. There is also a part called the Festival for parties of 6 or more. The party enters a room and kills monsters (also called mobs) until a time limit is up. This part of the Seven Signs also contributes to scoring in the Seals competition.
Other notable changes are: castle owners now have access to a fire-breathing Wyvern (Dragon) that they can fly around Aden (it should also be noted that they are very expensive to spawn and keep alive while in use); A Grade armor/weapons were added; and a subclass system was introduced that allows players to add another class to their character after level 75.
Chronicle 4: Scions of Destiny
Scions of Destiny was released on February 8, 2006. It featured expanded content in the form of new territories, enemies, summons, equipment, and a system designed to reward diligent, high level players that are victorious in a tournament in which they contend with other players in single combat. This expansion was released by NCsoft's North American counterpart on their Public Test Server on the 8th of January 2006.
Chronicle 5: Oath of Blood
The Chronicle 5 expansion was released September 6, 2006. Clans received a makeover and the player level cap was raised to 80. New siegeable castles were added to the towns of Rune and Schuttgart. The Demonic Sword Zariche was introduced.
Clan reputation can now be earned through Clan Academy, Clan Warfare, Clan Hall Battles and Clan Quests. Clan Reputation can be used to increase the rank of the clan to unlock clan skills and items. Clans of rank 5 and higher can create academies for the purpose of training and developing clan members. Members that complete their second class transfers through the academy receive commemorative items and increases the clan's reputation. Clan members of level 5 and higher can obtain a clan title. Clans can now have a maximum of 140 players, compared to the previous 40 players; accordingly, alliances can now only have 3 clans, instead of the previous limit of 12.
Roughly 50 skills were added for levels 55+ and the functions of certain skills were refined.
An extensive new crafting system was also introduced based on Life Crystals[6] farmed from raid bosses, which can be traded to NPCs for items.
Saga 2: The Chaotic Throne
Interlude
The name of the next Lineage II Saga was made public on October 12, 2006. Named "Lineage II: The Chaotic Throne", and the first release is entitled "Interlude", setting a new course for the Lineage II legacy[7]. Interlude went live on Korean servers in December 2006, while on the US & EU regions, Interlude went live on April 11, 2007[8].
Lineage II South-East Asia started with the Interlude patch on August 1, 2007, skipping the 3-year long Saga 1: The Chaotic Chronicle.
Features : Roughly 60 skills will be added, 51 of those are for levels 76+ and 9 for levels 55+. The function of certain skills will be refined.
Interlude consists of many new features, other things include masks, weapon augmentations, additional hunting zones, a new demonic weapon for PvP, and a lot more. Interlude features the 'lost island' (or new island for the players) named "Primeval Isle" where, according to Lore, the Giants used to live. You can reach there by taking a ship, by swimming from the north of the dark elf village, or jumping off Rune castle town's harbor and swimming there.
1st Throne: The Kamael
The 1st Throne was released to the retail server on Wednesday, December 12th 2007. 1st Throne includes a new race, "The Kamael".[9] Official art depicts them having a single wing and have elven characteristics, but whereas the elves use light magic, the Kamael will use dark magic. The 1st Throne also introduces the Fortresses which will allow smaller clans to retain a site whereas major clans hold castles, the fortress system creates a feudal system between clans as fortress owners will be required to swear allegiance to the territory rulers (castle owners) in order to gain some additional benefits. Fortresses have an internal instanced dungeon and private NPC shops and services such as buffs. Also introduced were two new hunting areas focused on higher level players, isle of prayer and Hellbound. Isle of Prayer includes several instances which must be completed and eventually the defeat of a boss named Baylor to gain entry to Hellbound. Hellbound is an island which is instanced and only able to be entered through two warp gates. Hellbound is unique in that it has several stages and changes with those stages.
The expected nation wars (inter-server mass pvp) were not introduced in this update as previously believed.
1st Throne: Hellbound (Kamael +)
This patch to the first throne was released on April 23, 2008. Changes include an increased level cap of 85 (only for main class), many new skills at level 81 which differ by not requiring SP, new skills for main classes dependent on the character's subclasses (including transformations for 80 subs), an increased focus on clans over alliances and the creation of an underground coliseum where players can form teams to fight against each other. Included with the hellbound release was the news of a future event (summer 2008) that will allow players to exchange their subclass with their main class on a one time basis.
2nd Throne: Gracia
Coming soon