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