While a mutation can assume many forms, it typically signifies an abnormal trait or ability not common to the species. Mutations can be pronounced or unnoticeable. They may grant extraordinary abilities or effect subtle to grotesque changes in a creature’s physiology.
Mutations may appear only at birth or manifest as consequences of radiation exposure or some horrible physical trauma.
Ordinarily, a GM should allow players to select appropriate mutations and drawbacks for their characters using the Mutation Point (MP) system presented below. However, for GM-controlled creatures and supporting characters, the GM can determine mutations randomly. Whenever a creature or supporting character gains a mutation, the GM may roll percentile dice and consult Table: Mutations below, then select an appropriate number of drawbacks with a total MP value equal to or greater than the MP cost of the randomly determined mutation.
All special qualities granted by mutations are considered extraordinary abilities. Using an extraordinary ability is a free action unless noted otherwise.