Games like Runeveil
Games like Runeveil include Slay the Spire, Balatro, Slay the Spire 2, Dicey Dungeons, and Wildfrost. We matched them by the tags players give Runeveil on Steam (Roguelike Deckbuilder, Card Game, Deckbuilding, Card Battler, and Roguelite): closest matches first, and among equally close ones the better-known games.

Slay the Spire
Shared: Roguelike Deckbuilder · Card Game · Card Battler

Balatro
Shared: Card Game · Roguelike Deckbuilder · Deckbuilding

Slay the Spire 2
Shared: Card Game · Deckbuilding · Roguelike Deckbuilder

Dicey Dungeons
Shared: Roguelike Deckbuilder · Deckbuilding · Card Battler

Wildfrost
Shared: Roguelike Deckbuilder · Card Game · Card Battler

Monster Train
Shared: Card Game · Card Battler · Deckbuilding

9 Kings
Shared: Card Game · Roguelike Deckbuilder · Deckbuilding

Die in the Dungeon
Shared: Deckbuilding · Card Game · Roguelike Deckbuilder

Dungeons & Degenerate Gamblers
Shared: Roguelike Deckbuilder · Card Game · Deckbuilding

Astrea: Six-Sided Oracles
Shared: Roguelike Deckbuilder · Card Game · Card Battler

Inscryption
Shared: Card Game · Card Battler · Deckbuilding

Breachway
Shared: Card Game · Roguelike Deckbuilder · Deckbuilding

Commander Quest
Shared: Roguelike Deckbuilder · Card Game · Deckbuilding

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

Black Jacket
Shared: Roguelike Deckbuilder · Card Game · Deckbuilding

Deathless. The Hero Quest
Shared: Roguelike Deckbuilder · Deckbuilding · Card Game

As We Descend
Shared: Roguelike Deckbuilder · Card Game · Card Battler

Yao-Guai Hunter
Shared: Roguelike Deckbuilder · Card Game · Card Battler

Ratropolis
Shared: Deckbuilding · Card Battler · Roguelite

Super Fantasy Kingdom
Shared: Card Game · Roguelite · Roguelike Deckbuilder

StarVaders
Shared: Roguelike Deckbuilder · Deckbuilding · Roguelite

Griftlands
Shared: Card Battler · Deckbuilding · Roguelite

Shogun Showdown
Shared: Roguelike Deckbuilder · Replay Value · Roguelike

Vault of the Void
Shared: Roguelike Deckbuilder · Deckbuilding · Card Game