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