Sin (罪, つみ tsumi) is a demon appearing in Shin Megami Tensei: 20XX Devil's Colosseum.
"Sin" is the disobedience to a religious or divine commandment, and opposite to live in Sanctity.
Shin Megami Tensei: 20XX Devil's Colosseum Edit
Sin is the first of the five secret spirits that can be found oppening a Magic Box during a full moon. Defeating it will rise the chance of fiding the next spirit by 50%.