Vampire - The Masquerade: Bloodlines is a cult game. It is based on the White Wolf universe aka World of Darkness.

You can join a lot of different (vampire) factions, you have a lot of different dialog-options, you get experience points for completing quests only (not for killing people!), the game has 5 different endings - depending on yours actions and decisions through the game. The game-graphics (source engine) and the music are top.

Unoffical patches are still in development.

A masterpiece!