Games like Demonic Defense
Games like Demonic Defense include Yu-Gi-Oh! Master Duel, Vampire Crawlers: The Turbo Wildcard from Vampire Survivors, Slay the Spire 2, Slay the Spire, and Shadowverse: Worlds Beyond. We matched them by the tags players give Demonic Defense on Steam (Card Battler, Tower Defense, Real Time Tactics, Action Roguelike, and Trading Card Game): closest matches first, and among equally close ones the better-known games.

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

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

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

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

Shadowverse: Worlds Beyond
Shared: Card Battler · Trading Card Game · PvP

Bad North: Jotunn Edition
Shared: Real Time Tactics · Tower Defense · Action Roguelike

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

Magic: The Gathering Arena
Shared: Trading Card Game · Strategy · PvP

Inscryption
Shared: Card Battler · Card Game · Strategy

Element TD 2 - Tower Defense
Shared: Tower Defense · Real Time Tactics · PvE

The Bazaar
Shared: Card Battler · Strategy · PvP

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

Balatro
Shared: Card Game · Strategy · Card Battler

Duelists of Eden
Shared: Card Battler · Action Roguelike · PvE

Mindustry
Shared: Tower Defense · Strategy · RTS

Ratropolis
Shared: Card Battler · Strategy · Real Time Tactics

Cardfight!! Vanguard Dear Days
Shared: Trading Card Game · PvP · Strategy

Dota 2
Shared: Strategy · PvP · Action

Monster Train
Shared: Card Battler · Card Game · PvP

Yu-Gi-Oh! Legacy of the Duelist
Shared: Card Battler · Trading Card Game · Card Game

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

The King is Watching
Shared: Tower Defense · Strategy · RTS

RUNGORE
Shared: Card Battler · Trading Card Game · Real Time Tactics

9 Kings
Shared: Strategy · Card Battler · Card Game

