Assassin’s Creed IV: Black Flag achievements

Defeat all 4 legendary ships.

Fully upgrade the Jackdaw.

Visit every location of the game.

Complete all naval contracts.

Explore all underwater shipwrecks.

Unlock all taverns.

Perform 5 air assassinations from a swinging rope.

Recruit 500 crew members.

Craft the Hunter outfit.

Fully upgrade your hideout.

Unlock the secret door in Tulum.

Hack 15 computers in Abstergo Entertainment.