Games like Cthulhu Realms
Games like Cthulhu Realms include GWENT: The Witcher Card Game, Magic: The Gathering Arena, Slay the Spire 2, Balatro, and Slay the Spire. We matched them by the tags players give Cthulhu Realms on Steam (Card Game, Strategy, Deckbuilding, Lovecraftian, and Free to Play): closest matches first, and among equally close ones the better-known games.

GWENT: The Witcher Card Game
Shared: Card Game · Strategy · Free to Play

Magic: The Gathering Arena
Shared: Card Game · Strategy · Deckbuilding

Slay the Spire 2
Shared: Card Game · Deckbuilding · Strategy

Balatro
Shared: Card Game · Deckbuilding · Strategy

Slay the Spire
Shared: Card Game · Deckbuilding · Strategy

Shadowverse: Worlds Beyond
Shared: Free to Play · Deckbuilding · Strategy

Dune: Imperium
Shared: Strategy · Deckbuilding · Card Game

Inscryption
Shared: Card Game · Deckbuilding · Strategy

Library Of Ruina
Shared: Card Game · Strategy · Deckbuilding

Cultist Simulator
Shared: Card Game · Lovecraftian · Board Game

The Bazaar
Shared: Strategy · Deckbuilding · Card Game

9 Kings
Shared: Strategy · Card Game · Deckbuilding

UNO
Shared: Card Game · Board Game · Strategy

Vampire Crawlers: The Turbo Wildcard from Vampire Survivors
Shared: Deckbuilding · Strategy · Card Game

Menace from the Deep
Shared: Lovecraftian · Deckbuilding · Card Game

Monster Train 2
Shared: Card Game · Deckbuilding · Strategy

Wingspan
Shared: Card Game · Strategy · Board Game

DICEOMANCER
Shared: Card Game · Strategy · Deckbuilding

Monster Train
Shared: Card Game · Deckbuilding · Strategy

Gremlins, Inc.
Shared: Card Game · Strategy · Board Game

Armello
Shared: Card Game · Board Game · Strategy

100% Orange Juice
Shared: Strategy · Card Game · Board Game

Stacklands
Shared: Card Game · Strategy · Deckbuilding

Clank!
Shared: Strategy · Card Game · Deckbuilding