An expansion pack was launched on November 18, 2003, titled EverQuest Online Adventures: Frontiers; it added a playable race—the Ogre—and character class—Alchemist—as well as many quests and items.

The world featured many places familiar to fans of the original and most of the differences were explained in the lore of EverQuest.

The gameplay focused on character advancement, environment combat, quests, exploration, grouping, and socializing.

The game was developed so that it did not require a hard disk drive (HDD) like Final Fantasy XI did.

Since no HDD for the system was ever released in PAL territories, EQOA remained the only MMORPG there.