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