Core

"Core" is the term that is being used to label all game content that is not exclusive for one campaign (chapter), but accessible for players of all campaigns.

This is a list of Core content:
 * Locations:
 * The Battle Isles are the common high-level PvP area including the Guild Halls.
 * The Realms of the Gods
 * Professions: The six professions introduced in Prophecies will be present in any future campaigns
 * Monk
 * Warrior
 * Elementalist
 * Necromancer
 * Ranger
 * Mesmer
 * Skills: Each of the core professions also has 40 core skills, 5 of which are elite.
 * Armor: Obsidian armor
 * Other features: To date, every new user interface feature except for those relating to heroes has been a core feature.
 * Items
 * subset of Runes and Insignia.
 * Weapons useable by core classes and selected Weapon upgrades for them.
 * Special PvP Games:
 * Dwayna vs Grenth
 * Dragon Arena
 * Rollerbeetle Racing

Semi-core
There are a few game features that do not fall under the complete definition of "core", in that they are not present in all campaigns, but they are still available in more than one campaign. These features include:


 * Armor: These art styles are available in both Prophecies and Factions for the core professions, but are not present in Nightfall.
 * Ascalon armor
 * Krytan armor
 * Tyrian armor
 * Special Event headgear: These items were available for in Prophecies and Nightfall, but were not available in Factions.
 * Ice Crown
 * Wreath Crown

Common non-core features
Some features are not strictly part of core set but so far had been found in each campaign:


 * Attribute quests for natives
 * Signet of Capture quests for natives
 * Ascension or its equivalent
 * An outpost providing access to Realms of the Gods.
 * Cartographer, Vanquisher, Skill Hunter, Guardian and Protector titles for respective campaign.