Here is the full list of all 14 Death Collector achievements.
Read other people's mail, if you dare.
Go with your instincts on the nature of nature.
Encourage an untalkative harvest to speak.
Evidence of ministry skulduggery. Use at your own risk.
Whatever you found, it isn't public knowledge.
Bring Vernon's silent tongue back to life.
Break the rules for the sake of an old woman's heart.
Breaking the rules is only half the story.
Put someone out of their misery before it gets worse.
Allow someone to avenge a brutal death, if you can stomach it.
Be brave enough to show your affection to someone who kills for a living.
Get out of court charges, by whatever means possible.
Incite a riot—deliberately, or as a cog in a wheel.
Get accepted into the Zythian class.