Here is the full list of all 28 Vampire: The Masquerade - there are Coteries of New York achievements.
Complete Agathon's questline.
Complete Adelaide Davis' questline ("Somebody's Watching Me") as her bitter foe.
Try running away from Qadir during your trial.
Nobody came to your help in the grand finale. Except for...
Complete the game with all three characters.
Hope came to your help in the grand finale.
Complete Benoit Segal's questline ("Faith and Myth").
Complete Hope's questlline.
Meet somebody you used to know in life as the Ventrue.
Tamika came to your help in the grand finale.
Complete D'Angelo's questline.
Meet somebody you used to know in life as the Toreador.
Complete Tamika's questline.
Convince Tamika to cooperate with you.
Become Embraced into the Toreador clan.
Accept your fate in Elysium.
Become Embraced into the Ventrue clan.
Rage against your fate and complete the game with any character.
Agathon came to your help in the grand finale.
D'Angelo came to your help in the grand finale.
Complete Frank Dougherty's questline ("A Nosy Reporter").
Complete Adelaide Davis' questline ("Somebody's Watching Me") as her latest obsession.
Meet somebody you used to know in life as the Brujah.
Fail to recruit somebody into your coterie.
Convince Hope to cooperate with you.
Convince D'Angelo to cooperate with you.
Convince Agathon to cooperate with you.
Become Embraced into the Brujah clan.