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