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