HB

The abbreviation HB most commonly refers to:
 * Hero Battles, a PvP arena that was removed from the game, where one player with a squad of three heroes fought against another player and his/her heroes.

It can also refer to the following skills:
 * Warrior:
 * , an elite skill in the Swordsmanship attribute.
 * Monk:
 * , an enchantment in the Healing Prayers attribute.
 * , an elite enchantment in the Divine Favor attribute.
 * Mesmer:
 * , a stance in the Domination Magic attribute.