Ember

In the center of the farmlands, you will find a farm run by a man named hamish (you will see a ? quest marker on the map) and inside his house is a book called The Dragon Hunter Journal, picking up this book will start this optional sidequest.

Once you pick up the journal, talk to Hamish about Moros, the owner of the journal and he will point you north to the Southern Forest, a grey quest marker will appear to where the cave where you need to go can be found.

Inside this cave is a boss, I beat him at level 6 using healing and energy potions so it should be fairly easy if you are higher level or playing on Easy difficulty.

I had 3 party members at this time.

The reward is a lvl 9 weapon which is fine and a bunch of XP.

Cheers.

West of the City of Light (The City is to the south) you can find the area West Coast, the area is level 15-17 but you can go there anytime and just run away from the fights.

In this area, go north along the coast and then west to find a hidden path up the mountain (the path is not marked and looks like an ordinary walled off mountain).

Once you run on the path, you will be teleported to an ancient cave and find a dagger on an altar.

The Dagger of Worlds has a special ability called Armageddon, equipping the dagger and using this ability will give you the achievement.

The Dagger doesnt have level requirements and there is no boss in the cave, so you can get this achievement at any level once you can free roam the world.

Here is a video showing you how to get this achievement.

To start this sidequest you must travel to the City of Light in the south an find a woman named Anna.

She is not marked in the map, so this achievement is kinda missable if you are not exploring areas meticulously.

Anna can be found in the northwest part of town, to the right of the council hall, she will be screaming for help once you get near the area, a good way to find her is to just follow the north wall of town west from the entrance.

Anna will give you a task that will take you to another part of town and then to the sewers.

To access the sewers, you must follow the main quest until you get access to the Thieve's guild.

Once you go down to the sewers, go east then south to find a woman named Alicia who will give you the key to the western part of the sewers.

Kill the cultists and the Journal will tell you to go back to Anna but this is incorrect, you need to go back to Alicia who will reward you with XP and this achievement.

Cheers

Shortly after you get past the toxic gas in the Bog of Souls for the main quest, you will encounter Liam to the east on a bridge.

Lian isnt marked as a sidequest on the map, so you might miss him if you blindly follow the green quest marker instead.

Talking to Liam and agreeing to help him will start this sidequest.

You can go ahead and do a detour to heal him or let him die, this decision will affect the end battle of this quest.

You should now see a quest marker for Gloria in the map, you will have to battle to get to her but once you do, talk to her and this achievement will unlock.

Cheers.

After defeating the necromancer and restoring yourself, you will be given the task to restore 4 shrines.

To start this quest, go to the Docks area, west of City of Light, take a boat from there to Cliff of Giants to speak with the Giant King.

He will direct you back to the southern docks in City of Light to meet with Calabar from Fish Co. about some fish.

Make a Hard Save here, since the next choice will determine if you get this achievement or Just Keep Swimming

After accepting Calabar's quest and exiting the building, a man named Lenny will approach you.

To get this achievement, you need to accept the sabotage job from Lenny and use the Tinder Box on the explosive kegs on the ship, Blue Whale.

This is the faster of the two achievements.

To use the Tinder Box, just drag it into a keg from your inventory.

Make sure to run after igniting the explosives!

Once it blows up, achievement unlocked, you can now reload the save, refuse the sabotage and go for the longer achievement: Just Keep Swimming which involves fishing.