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...
Try running away from Qadir during your trial.
Accept your fate in Elysium.
Complete the game with all three characters.
Agathon came to your help in the grand finale.
Meet somebody you used to know in life as the Ventrue.
Complete Agathon's questline.
Convince Agathon to cooperate with you.
Become Embraced into the Ventrue clan.
D'Angelo came to your help in the grand finale.
Hope came to your help in the grand finale.
Complete D'Angelo's questline.
Complete Adelaide Davis' questline ("Somebody's Watching Me") as her bitter foe.
Meet somebody you used to know in life as the Brujah.
Convince D'Angelo to cooperate with you.
Complete Hope's questlline.
Convince Hope to cooperate with you.
Become Embraced into the Brujah clan.
Rage against your fate and complete the game with any character.
Tamika came to your help in the grand finale.
Complete Tamika's questline.
Complete Frank Dougherty's questline ("A Nosy Reporter").
Complete Adelaide Davis' questline ("Somebody's Watching Me") as her latest obsession.
Convince Tamika to cooperate with you.
Complete Benoit Segal's questline ("Faith and Myth").
Meet somebody you used to know in life as the Toreador.
Fail to recruit somebody into your coterie.
Become Embraced into the Toreador clan.