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
 * A subset of Runes and Insignia that are common or apply to the core professions listed above.
 * Weapons useable by core classes and selected Weapon upgrades for them.
 * Special PvP Games:
 * Dwayna vs Grenth
 * Dragon Arena
 * Rollerbeetle Racing
 * Titles - Many titles are achievable in any campaign.  Note that, even though the Max titles track is itself core, it cannot be maxed without achieving titles from multiple campaigns.

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 (also available in the Eye of the North expansion)
 * Special Event headgear: These items were available in Prophecies and Nightfall, but were not available in Factions.
 * Ice Crown
 * Wreath Crown
 * Various Bounty-based titles are available everywhere except Prophecies. The titles themselves vary, but the concept is common in that you gain reputation with a particular faction or group.

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.