Here is the full list of all 80 Ortharion : The Last Battle achievements.
Improve the rank of one of your spells.
Improve the rank of one of your spells up to level 2
Improve the rank of one of your spells up to level 3
Improve the rank of one of your spells up to level 4
Improve the rank of one of your spells up to level 5
collect Ortharion's fragments
Kill the Ice Dragon in "The Peaks"
Kill the earth titan in the cave in "the big north"
Kill the Angel of Death in the crypt of "Granock's Citadel"
Slay the Plains Dragon in "The Enchanted Mountain"
Slay the dragon Rex in "The Snowy Ruins"
Kill the Forest Dragon in "The Road to Ascension"
Kill the Skeleton Dragon in the crypt of "The Town of Granock"
Kill the Volcanic Dragon in the cave of "The Great Volcanic Desolation"
Slay the rock dragon in "the path of great desolation"
Kill the ork leader in "the Ork region"
Kill the witch in "the swamp"
Kill one of the general demon in the crypt of "resisters"
Kill one of the demon general in the cave of "the small mountain path"
Kill one of the demon general in the cave of "the city of the desert"
Kill the demon lord.
Reach Level 10
Reach Level 25
Reach Level 40
Reach Level 70
Reach Level 100
Complete a level 0 dungeon
Complete a level 30 dungeon
Complete a level 60 dungeon
Complete a level 100 dungeon
Complete a level 150 dungeon
Kill some elite
Finish the game in any difficulty
Finish the game in hardcore difficulty
Finish the game in lone wolf difficulty
Finish the game with both hardcore and lone wolf difficulty enabled
Kill the last boss in the arena
Finish the game in lone wolf difficulty, in less than 30 hours.
Learn a total of 10 spells on the same character.
Learn a total of 20 spells on the same character.
Learn a total of 35 spells on the same character.
Learn a total of 50 spells on the same character.
Learn a total of 80 spells on the same character.