Games like Monoka
Games like Monoka include Monster Train, Slay the Spire, Inscryption, Slay the Spire 2, and Balatro. We matched them by the tags players give Monoka on Steam (Card Game, Deckbuilding, Card Battler, Turn-Based Tactics, and Action Roguelike): closest matches first, and among equally close ones the better-known games.

Monster Train
Shared: Card Game · Card Battler · Deckbuilding

Slay the Spire
Shared: Card Game · Card Battler · Deckbuilding

Inscryption
Shared: Card Game · Card Battler · Deckbuilding

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

Balatro
Shared: Card Game · Deckbuilding · Strategy

Yu-Gi-Oh! Master Duel
Shared: Card Game · Strategy · Card Battler

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

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

Infinity Wars: Animated Trading Card Game
Shared: Card Game · Deckbuilding · Strategy

The Bazaar
Shared: Deckbuilding · Card Game · Card Battler

Wildfrost
Shared: Card Game · Card Battler · Turn-Based Tactics

Marvels Midnight Suns Digital Edition
Shared: Deckbuilding · Turn-Based Tactics · Card Game

Monster Train 2
Shared: Card Game · Deckbuilding · Turn-Based Tactics

One Step From Eden
Shared: Deckbuilding · Action Roguelike · Card Battler

Cross Blitz
Shared: Deckbuilding · Card Game · Card Battler

Stacklands
Shared: Card Game · Card Battler · Strategy

Library Of Ruina
Shared: Card Game · Deckbuilding · Strategy

9 Kings
Shared: Card Game · Strategy · Deckbuilding

Animation Throwdown: The Quest for Cards
Shared: Card Game · Card Battler · Strategy

Dream of Corpse Lady
Shared: Card Game · Card Battler · Strategy

Armello
Shared: Card Game · PvP · Strategy

GWENT: The Witcher Card Game
Shared: Card Game · Deckbuilding · Strategy

Shadowverse: Worlds Beyond
Shared: Card Battler · Deckbuilding · Card Game

Gordian Quest
Shared: Card Game · Card Battler · Strategy