Here is the full list of all 52 Confrontation achievements.
Play Melian for 5h
Play Caan for 5h
Play Nemrod for 5h
Play Haeth for 5h
Play Fera for 5h
Play Darius for 5h
Kill 20 Belisarius
Kill 15 Totem bearers
Finish the solo campaign
Open a character data sheet 100 times
Play Taelyn for 4h
Kill 20 Biopsists
Finish Chapter 3
Reach level 40 with a unit
Play Lothaire for 5h
Play Nekhys for 6h
Make 50 quick loads
Kill 10 Sibyls
Kill 10 Ritualists
Play Zelia for 6h
Earn 3,000,000 XP points
Play Lanwys for 6h
Play Dalon for 6h
Kill 10 Pack leaders
Reach level 30 with a unit
Kill 100 Wolfen
Finish Chapter 2
Kill 15 Fanatics
Kill 15 Initiates
Reach level 20 with a unit
Kill 100 Orcs
Use Fireball 50 times with Nekhys
Use Exorcism 50 times with Nemrod
Let your units fall to the ground in agony 150 times
Use Wave of Fervour 50 times with Lothaire
Finish Chapter 1
Suffer 50 fears
Let Zelia fall to the ground in agony 25 times
Use Meteor 50 times with Zelia
Use Shadow's kin 50 times with Fera
Kill 20 Dasyatis
Suffer 100 stuns
Launch the game credits
Use Holy Prayer 50 times with Darius
Spend 10 Armor points
Spend 10 Attribute points
Reach level 10 with a unit
Make 50 quick saves
Spend 10 Weapon points
Use Divine Favor 50 times with Lanwys
Kill 100 Scorpions
Kill a Mecasyatis