You'll have to pay for a $20 DLC to unlock two out of six clans in Vampire: The Masquerade - Bloodlines 2.
(www.eurogamer.net)
Here's how the clan selection screen looks at the moment:
In their defence, and I hope, in the case of the first game, each clan was an entire new storyline and it was awesome. I might buy it, if the base game is on special in 2 years for 30$ and the DLC is 10$ on special