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