Here is the full list of all 14 inFAMOUS: Festival of Blood trophies - there are 11 bronze, 2 silver and 1 gold.
Bite 100 Civilians.
Play 20 Festival of Blood UGC Missions
Unlock all powers.
Defeat Bloody Mary.
Bite a member of a street parade.
Destroy a balloon.
Collect all Canopic Jars and max out your blood meter.
Return to the underground while no mission is active and travel from one end of the catacombs to the other.
Stay airborne for 250 meters while in Shadow Swarm.
Discover all of Mary's Teachings.
Collect half of the Canopic Jars.
Clear out 20 Vampire packs.
Stake 20 hidden Firstborn vampires.
Stake 100 Vampires.