'You were victorious in a Kraken encounter and lived to tell the tale!' *Note* - Some people have stated that they haven't unlock this achievement despite killing the kraken a few times, so there is a chance you won't get this first try!
This is fairly easy to get once you find the kraken if you have a crew and you communicate well and try and shoot the tentacles quickly before the kraken ends up killing you and destroying your ship. So i'd recommend having a full crew as it will make it easier (especially with the Galleon) but it can be done solo.
The main issue with this achievement is that the Kraken is a rare encounter, and throughout my whole play time of the game, I only ever encountered it twice. You could get lucky and get it to spawn straight away, or it'll take you forever. From what I believe, there is no set spawn for it (will update if not the case) so you can sail anywhere for it to spawn. You'll know your about to fight the kraken when the water below you turns blackish (ink).Tip for when your in the battle:
- Always try and keep a lot of cannon balls on your ship (Outposts have a lot in crates you can take), as well as banana's and wooden planks.
- With the cannon balls, aim for the belly part of the tentacles (where it is thickest).
- If you use a gun, aim for the head of the tentacle (specifically the mouth as that does most damage)
- Don't do nothing for ages as they will attack you, and bring you down into the sea with them killing you as well as making your ship sink
-If you do get grabbed by a tentacle, keep on hitting it with your sword until it drops you
-If you end up in the water, try to stay away from the surface of the ocean as much as possible because you will take damage due to the layer of ink on the ocean (tentacles won't attack you while you are in the ocean so just quickly find the ship)
The achievement should pop once the tentacles go back into the ocean after shooting them (You don't need to kill them all, once you have killed or damaged enough tentacles, the rest will fall back into the sea) .
Happy Sailing ;)