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