Here is the full list of all 60 Raven's Cry achievements.
Advance to level 10
Advance to level 20
Advance to level 30
Collect 500 000 reales
Earn 50 000 reales from trading
Waste 10 000 cannonballs
Waste 5 000 chainballs
Waste 2 500 grape shots
Kill 50 enemies on land
Kill 20 enemies using Fear skill
Shoot 20 enemies
Eliminate 20 enemies silently
Kill 10 enemies using a knife
Kill 5 enemies with explosions
Obtain all the upgrades to the Serpent's hull
Fully upgrade the Serpent's sails
Buy and install the maximum amount of cannons for the Serpent
Buy and install all of the cannon types aboard the Serpent
Get your crew quarters fully upgraded
Sink 50 schooners
Sink 25 small galeons
Sink 25 frigates
Sink 20 galeons
Sink 20 warships
Sink 500 ships
Sink a ship by ramming it
Acquire a schooner
Acquire a small galeon
Acquire a frigate
Acquire a galeon
Acquire a warship
Acquire a ship of the line
Successfully board 20 ships
Destroy a ship during boarding
Burn a ship after boarding
Release a ship after boarding
Blow yourself up.
Hire an officer
Use your Raven to steal something 30 times
Win a game of dice
Prepare any tincture
Use 50 000 reales on hull repairs
Get Ally reputation with Spain
Get Ally reputation with England
Get Ally reputation with France
Get Max reputation as a Pirate
Get reward from Spanish Ally
Get reward from English Ally
Get reward from French Ally
Find Unicorn Horn (Narwhals Horn)
Get Special Upgrade
Finish Tutorial
Finish first chapter
Finish second chapter
Finish third chapter
Finish the game
Kill Marcus
Save Marcus
Naughty, naughty.