Some classes have optional, alternate abilities based on being part of an organization or some other criteria. Below is a list of options, sorted by class.

Monk

Blades of Belsameth: May multiclass as Rogues.

Closed Book Monks: Receive training in the handhammer. Do not receive proficiency in siangham or kama.

Exemplars of Onn: Monks of the Heaven Exemplars of Onn (a specific school) may multiclass as either Clerics of Wizards.

Fists of Mithril: Instead of the weapon proficiencies listed under the Monk Class, Fists of Mithril receive proficiency with the Longsword. (See Mithril: City of the Golem.)

Monks of the Dawn Spear: May multiclass as Clerics of Madriel.

Paladin

Gold Knights: May freely multiclass as Clerics of Corean.

Iron Knights: May freely multiclass as Fighters.

Knights of the Blessed Homestead: May freely multiclass as Clerics of Imal, Wheatsheaf, or Katashama.

Knights of the Blossom: May freely multiclass as Clerics of Syhana or Aspharal.

Knights of Goran: May freely multiclass as Fighters.

Knights of the Sirroco: May freely multiclass as Rangers.

Order of the Rack: May freely multiclass as Rogues.

Paladins of the Sun: May multiclass as Clerics of Madriel.

Silver Knights: May freely multiclass as Wizards and Loremasters.

Psion

Psychic Fatigue: Running 1/4 or less of your Power Point total is fatiguing. See Relics & Rituals 2 for more information.

Psychic Warrior

Psychic Fatigue: See Psion.

Sorcerer

Arcane Heat: Arcane magic (except Bardic magic) creates an aura of heat. This provides some protection against the cold, temporarily, but also doubles the spell-failure chance of armor. See Relics & Rituals for more.

Soulknife

Psychic Fatigue: See Psion.

Wilder

Psychic Fatigue: See Psion.

Wizard

Arcane Heat: See Sorcerer.

Summoners of the Obsidian Pyre: Alternate summon table found on page 16 of Wizards, Bards, and Sorcerers.