Mechanics

Cataclysm-BN monsters are classified by species (MAMMAL, ZOMBIE, INSECT, PLANT, FUNGUS, NETHER, ABERRATION, FISH, BIRD, REPTILE, MOLLUSK, AMPHIBIAN, WEB_SPIDER). Species determines damage vulnerabilities (e.g., insecticide vs insects, fire vs plants/fungus, cold vs nether) and behavioral patterns.

Cataclysm-BN professions (339+) define starting items, skills, traits, and scenario conditions. Each profession creates a distinct early-game play style through item grants and skill bonuses.