Divinity: Original Sin - Enhanced Edition

This Achievement is a bit misleading, since you can't learn every Skill. You only can learn
- 6 Novice
- 4 Adapt
- 2 Master Skills.
and that's it, you need to have a Skill in every "Slot". With Level 4 you can lean one Master and with Level 5 Master Skills. This needs to be done in one of the Skilltrees: Aerotheurge, Expert Marksman, Hyrdosophist, Man-at-Arms, Pyrokinetic, Scoundrel, Witchcraft, Geomancer

Just to note you not only need to purchase all the skills within. Ann ability under the skill branch but you also need to fully assign the spells.

Eg if you have opted for expert marksman you need to assign 6 novice spells, 4 adept Then 2 master spells.

The achievement will unlock as soon the final spell has been aassigned.

You need to be level 15 before you can assign master spells. The achievement is not misleading it its referring to spells

This Achievement is HOST only.

Note: You can get this with other skills but this is the one I did it with, as some others like "Witchcraft" require you to be level 15 to get this achievement.

This is the easiest and fastest way that I have found to unlock it. (Will still take 20-30 hours)

Tips
-Start fights with everything for XP
-Play on easiest difficulty
-Get the Talent "All Skilled up"
-Steal everything with Wolgraff (To sell obviously)

What to do!
What you need to do is get to Level 12 and get "Geomancer" to Level 5. You can do this with any character. I myself did this with Jahan.

Guide
You need to keep playing the game and continuing the story until the point where the game will force you to open 1 of 4 doors Earth, Fire, Ice and Air in "End of Time". (I was around level 9 at this time.)

You want to open EARTH! This will give you the merchant Peat. He sells high level Geomancer and Witchcraft skill books, once this is done keep playing until you reach Level 12.

When you are Level 12 and have Geomancer to Level 5 you will be able to get this achievement.
Go to Peat and purchase all skill books, and use them. (This won't be enough though) Then fast travel to "Lucille Forest - Cyseal Road" and goto the community and near the tavern will be "Hassat", He will sell more Geomancer skill books, buy the ones you have not used and this will get you the achievement.
He can be found here ^^

P.S You don't need to take the Companion with you for them to gain XP, Meaning leave them sat in the "Hall of Heroes" and when you reach level 12 go and equip them and they will go straight to your Level.