They have been shunned and feared by society forever. Born of tainted bloodlines and raised in shameful secrecy, the tieflings of Golarion count among their ancestors some of the greatest evils of the Great Beyond. Yet not all tieflings succumb to the sinister compulsions of their evil blood - some strive to rise above the stereotype and become heroes in their own right. This Pathfinder sourcebook explores all that it is to be a tiefling, including not only an extensive discussion of tiefling culture and society, but also presenting numerous variations on the standard tiefling character. Rules for tieflings of specific fiendish heritages, new feats and magic, variant tiefling abilities and tiefling appearances, and new options for inquisitors, summoners, sorcerers, clerics and more await discovery in this Pathfinder Player Companion.