Here is the full list of all 49 Demonicon - there are The Dark Eye achievements.
Sacrificed Calandra as First Paladin
250 potions or poisons used
50 potions or poisons used
Destroyed the New Church's Catechism
10 potions or poisons used
Sacrificed yourself as First Paladin
Played Demonicon through without using a single healing potion
Returned to Moloch Mountain
Introduced the Catechism to the New Church
Defeated Azaril
Slept with Calandra
Denied Calandra
Acknowledged father and thereby chosen humanity
Acknowledged Seghal and thereby chosen the Gift
Freed father from imprisonment
Killed Cassio and sacrificed her blood
Banished bandits
Banished guards
Taifelel defeated
Gave Ulev the talisman
Gave Genla the talisman
Led the Fernfielders to their fate
Defeated Ghamat and the Plague Maw
Achieved a chain of 24 blows
Reached Level 7 in one Adventure talent
Raised an attribute to its maximum
Defeated the Iribaar's Lily and yourself
Completed 5 battles without a scratch
Suffered the pain of Rondra's prescence
Convicted and killed Falk
Defeated the overpowering Heshthot in the market
Reached Mastery Rank Four in one talent
Used 200 combat moves
Spoken to Borbarad's Council of the Dead
Caught the summoner in the Praios temple
Became member of the City Guard
Became member of the Kreutzer Cartel
Cast 200 Gift spells
Achieved a chain of 12 blows and triggered Demonic Fever
Successfully dodged two hundred times
Killed 10 enemies solely with Ranged Weapons
Killed Borak the Bruiser
Killed the cannibal in Moloch Mountain
Spared the cannibal in Moloch Mountain
Passed a Talent test
Received the Gift in the tutorial
Learned Chain of Blows
Played Demonicon through in Nether Hellish difficulty
Played Demonicon through in Hard difficulty