Games like Soulreign
Games like Soulreign include 9 Kings, The Bazaar, Super Fantasy Kingdom, Slay the Spire, and Griftlands. We matched them by the tags players give Soulreign on Steam (Card Battler, Roguelite, Creature Collector, Auto Battler, and PvE): closest matches first, and among equally close ones the better-known games.

9 Kings
Shared: Auto Battler · Strategy · RPG

The Bazaar
Shared: Card Battler · Auto Battler · Strategy

Super Fantasy Kingdom
Shared: Roguelite · Strategy · Auto Battler

Slay the Spire
Shared: Card Battler · Roguelite · Strategy

Griftlands
Shared: Card Battler · Roguelite · RPG

He is Coming
Shared: Auto Battler · Roguelite · Strategy

Monster Train
Shared: Card Battler · Roguelite · Strategy

Morimens
Shared: Card Battler · Roguelite · PvP

Batomon Showdown
Shared: Creature Collector · Auto Battler · Strategy

Legend Creatures(传奇生物)
Shared: Roguelite · Auto Battler · Indie

Inscryption
Shared: Card Battler · Roguelite · Strategy

Slay the Spire 2
Shared: Card Battler · Strategy · Roguelite

Cross Blitz
Shared: Roguelite · Card Battler · RPG

Backpack Battles
Shared: Auto Battler · Strategy · PvP

Stacklands
Shared: Roguelite · Card Battler · Strategy

Loop Hero
Shared: Roguelite · Indie · Deckbuilding

Roguebook
Shared: RPG · Roguelite · Indie

Ratropolis
Shared: Card Battler · Roguelite · Strategy

Kādomon: Hyper Auto Battlers
Shared: Creature Collector · Card Battler · Auto Battler

Firestone – Idle Clicker Online RPG
Shared: Auto Battler · PvE · RPG

Dicey Dungeons
Shared: Card Battler · Roguelite · Strategy

Kabuto Park
Shared: Creature Collector · Card Battler · PvE

Oaken Tower
Shared: Auto Battler · Strategy · Card Battler

Just King
Shared: Roguelite · Auto Battler · Strategy