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