"What exactly constitutes a 'sufficient reason'?" The usually quiet Yu Liang suddenly spoke up to inquire.
"For example, being part of the Chaos Neutral faction would mean your identity in Cyber City is an 'assassin'. That's why you would need to assassinate key individuals from both sides to earn your reward, or to boost your reputation," Black, as a "player", seemed to have a deeper understanding of the Strange Talk World, "Or let's say you've been living in these Sewers for a long time, the Nine Yin Sect happens to be your neighbor, and the conflict between the opposing factions disturbed your sweet dream, so you resort to killing them both. There's also..."
"And what else?" Yu Liang pressed on.
Black answered, "Your friends and family might be in specific factions, for instance your friend could be part of Chaos Neutral, or maybe your mom belongs to the Nine Yin Sect's faction, so you have enough of a reason to join the corresponding faction."