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