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.
Meet somebody you used to know in life as the Toreador.
Complete D'Angelo's questline.
Tamika came to your help in the grand finale.
Complete Adelaide Davis' questline ("Somebody's Watching Me") as her latest obsession.
Complete Frank Dougherty's questline ("A Nosy Reporter").
Complete Tamika's questline.
Meet somebody you used to know in life as the Brujah.
Complete Agathon's questline.
Convince Tamika to cooperate with you.
Convince Agathon to cooperate with you.
Accept your fate in Elysium.
Become Embraced into the Toreador clan.
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.
Convince D'Angelo to cooperate with you.
Complete Hope's questlline.
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 Ventrue.
Convince Hope to cooperate with you.
Fail to recruit somebody into your coterie.
Become Embraced into the Ventrue clan.