Full list of all 19 Far Cry 3 Blood Dragon achievements worth 400 gamerscore. It takes around 6-8 hours to unlock all of the achievements on Xbox 360.
Kill 25 Dragons
Own all Weapons Attachments
Finished Final Showdown
Headshot Every Type of Enemy
Finish all the Predator's Path Quests
Find all VHS Tapes
Finish all the Garrisons
Reach Maximum Level and Become the Ultimate Badass
Finish all the Hostages Situations
Find all TV SETS to Decrypt the Hidden Message
Find all of Dr. Carlyle's Notes
Kill all the Animal Types
Destroy 5 Braincages
Jump Down from 50 Meters
After saving Darling, enter Combat Mode with a Dragon and Return to Stealth
Kill a Dragon with the Bow
Finished First Garrison
Kill Your First Dragon
Finished Helicopter Entry