Here is the full list of all 67 Fictorum achievements.
Complete Fictorum on Hardcore
Cast 500 Lightning Spells in a Single Playthrough
Have more than 10 spells in your inventory at once
Defeat the Grand Inquisitor
Unlock the Ascended Starting Title
Complete Fictorum as the Firebrand
Complete Fictorum on Reese Mode
Complete Fictorum on Classic mode
Unlock the Soaring Arrow Starting Title
Defeat Brazmek, the Earth Golem
Defeat Caeleste, the Angel of Wind
Defeat Giama, the Master Summoner
Defeat Ventas' Favored
Defeat Balmur, the Frost Giant
Defeat Rintara, the Archmage
Unlock the Giftbringer Starting Title
Reach Chapter Five
Damage 500 Buildings in a Single Playthrough
Cast 500 Abilities in a Single Playthrough
Complete Fictorum as the Ascended
Complete Fictorum on Normal
Cast 500 Fire Spells in a Single Playthrough
Cast 500 Ice Spells in a Single Playthrough
Unlock the Veiled Tarragon Starting Title
Unlock the Coiled Wyvern Starting Title
Unlock the Battlemage Starting Title
Unlock the Vulnerable Starting Title
Complete Fictorum as the Starcaller
Unlock the Eternal Winter Starting Title
Unlock the Starcaller Starting Title
Complete Fictorum as the Tempest
Complete Fictorum on Easy
Unlock the Infinite Dragon Starting Title
Unlock the Twilight Maelstrom Starting Title
Reach Chapter Eight
Reach Chapter Nine
Unlock the Verdant Incinerator Starting Title
Complete Fictorum as the Frost-bound
Complete Fictorum as the Eternal Winter
Complete Fictorum as the Infinite Dragon
Complete Fictorum as the Twilight Maelstrom
Complete Fictorum as the Veiled Tarragon
Complete Fictorum as the Coiled Wyvern
Complete Fictorum as the Battlemage
Complete Fictorum as the Vulnerable
Complete Fictorum on Hard
Complete Fictorum on Nightmare
Complete Fictorum using only Fire Spells (Untranscribed abilities are okay)
Complete Fictorum using only Ice Spells (Untranscribed abilities are okay)
Complete Fictorum using only Lightning Spells (Untranscribed abilities are okay)
Complete Fictorum using only Corrupted Spells (Untranscribed abilities are okay)
Complete Fictorum using only Wind Spells (Untranscribed abilities are okay)
Complete Fictorum using only Earth Spells (Untranscribed abilities are okay)
Complete Fictorum using only Physical Spells (Untranscribed abilities are okay)
Complete Fictorum using only Arcane Spells (Untranscribed abilities are okay)
Complete Fictorum on Abridged mode
Complete Fictorum on Expanse mode
Have a unique item in every equipable slot
Cast each spell in the game at least once
Use each type of rune in the game at least once
Unlock the Bulwark Starting Title
Unlock the Chronomancer Starting Title
Unlock the Voidbringer Starting Title
Unlock the Earthmolder Starting Title
Unlock the Titanic Starting Title
Unlock the Thunderborn Starting Title
Unlock the Bottom of the Barrel Starting Title