Tieflings have a demon or other evil outsider in their family history, and this can cause them some social problems dealing with others, as there is the assumption of evil or deciet on their part. However, Tieflings are as varied as humans, as evidenced by their total of eleven different heritages to choose from!
Ability Scores: +2 Dexterity, +2 Intelligence, -2 Charisma. Thanks to these bonuses, they make excellent Alchemists, Rogues, Witches and Wizards. They can also make decent Sorcerers thanks to the Fiendish Sorcery ability, which makes up for the Charisma penalty.
Type: Tieflings have the Outsider (native) type, which is actually pretty detrimental, since this means you can’t cast any spells that affect only humanoids on them, such as enlarge person. However, it also means they’re not affected by spells that negatively affect humanoids, such as charm person, so it’s a double-edged sword.
Size: Tieflings are the same size as humans.
Speed: Tieflings move at the same speed as humans.
Fiendish Resistance: Starting off with resistance 5 to three different elements is excellent, and it means that they can go up against spellcasters with a little less worry than some humanoid races.
Skilled: A +2 to Bluff and Stealth are decent, and are obviously very good for a Rogue. For other characters, they’re not quite as useful.