Here is the full list of all 45 Buccaneer: The Pursuit of Infamy achievements.
Sink a ship
Sink 100 ships
Sink 500 ships
Sink 1000 ships
Pick up a Merchant Cargo
Upgrade a ship to maximum stats
Buy a new ship
Discover the Isles of the Dead
Reach 5000 gold
Reach 10000 gold
Reach 20000 gold
Reach 5000 Infamy
Reach 10000 Infamy
Recover the remains of Captain McGowan
Sink 10 ships in a single level
Unlock every ship in the game
Complete the campaign
Complete all missions in the Isles of the Dead
Attain Perfect Morale
Achieve Mutinous Morale
Host a multiplayer game
Host 10 multiplayer games
Host 100 mutiplayer games
Play every multiplayer map for one faction
Play every multiplayer map for both factions
Gain 500 points in a multiplayer game
Gain 1000 points in a multiplayer game
Sink a Widowmaker in a multiplayer game
Sink a Goddess in a multiplayer game
Sink 5 ships in a multiplayer game
Sink 10 ships in a multiplayer game
Sink 20 ships in a multiplayer game
Sink a friendly ship in a multiplayer game
Sink an enemy ship with a suicide ship
Get sunk 10 times in a multiplayer game
Return an enemy Treasure Boat to port
Reach 20000 Infamy
Few are they who walk this path
Complete a Co-op Mission
Complete the Scarlet Isles Campaign
Complete the Hilton Crag Campaign
Complete the Georgetown Campaign
Complete the Blood River Campaign
Complete the Black Bay Campaign
Complete 5 Co-op Campaigns