ability score increase:
When determining your character’s ability scores, increase one score by 2 and increase a different score by 1, or increase three different scores by 1. You can't raise any of your scores above 20.
age:
Tieflings mature at the same rate as humans but live a few years longer.
alignment:
Tieflings might not have an innate tendency toward evil, but many of them end up there. Evil or not, an independent nature inclines many tieflings toward a chaotic alignment.
Size:
Medium
speed:
Your base walking speed is 30 feet.
Languages:
Your character can speak, read, and write Common and one other language that you and your DM agree is appropriate for the character. The *Player’s Handbook* offers a list of languages to choose from. The DM is free to modify that list for a campaign.