A triceratops is a three-horned herbivorous dinosaur. They are aggressive toward interlopers, attacking anyone who might appear to be a threat. Individuals are quite large, weighing 11,000 to 20,000 pounds and ranging from 26 to 30 feet in length.

When facing opponents of smaller size, a triceratops will usually attempt to trample them, reserving the gore attack for larger opponents. Up to two adjacent man- sized or up to four smaller opponents may be trampled simultaneously; the triceratops rolls a single attack roll which is compared to the Armor Class of each of the potential victims, and then rolls a separate damage roll for each one successfully hit. The gore attack may only be used against a single man-sized or larger creature, but may be used in the same round as the trample if the creature being gored is larger than man sized. Also note that a charging bonus may be applied to the gore attack.