Here is the full list of all 46 Sorcerer King: Rivals achievements.
Win as the Guardian
Slay Vetrar
Defeat Abeix
Play for 40 hours
Complete the Campaign
Win a game without a single shard destroyed
Win as the Wizard
Defeat Corvos
Play for 15 hours
Defeat a Minor Faction that has sided with the Sorcerer King
Win a "predicted defeat" tactical battle without taking damage
Reach level 15 with a champion
Get a city to level 9
Ally with a Minor Faction
Equip a champion with items in every slot
Complete a Champion Quest to recruit a new Champion to your cause
Win a "predicted defeat" tactical battle
Get a city to level 5
Use pioneers to upgrade an Outpost
Use a pioneer to build an Outpost
Craft an item
Play for 5 hours
Lower the Doomsday Counter
Reach level 5 with a champion
Win a tactical battle
Use the Sovereign's magic to intervene in a tactical battle
Claim a Shard
Build your first city improvement
Channel the focus of your Magic between Mana, Lore, and Sovereign Skill
Complete a Quest
Play for 100 hours
Settle a new city
Found 5 additional cities in a single game
Slay Aegethon
Destroy one of the Sorcerer King's Strongholds
Kill an enemy with a pioneer attack
Win 20 "predicted defeat" tactical battles without taking damage
Win a game on Insane Difficulty
Win as the Tyrant
Win as the Priest
Win as the Tinkerer
Win as the Commander
Win as Undead
Win as Frozen Realm
Defeat Nabunihr
Achieve Ascension Victory