Games like Runespell: Overture
Games like Runespell: Overture include Slay the Spire, Balatro, Across the Obelisk, Gordian Quest, and Slay the Spire 2. We matched them by the tags players give Runespell: Overture on Steam (Card Battler, Card Game, Deckbuilding, RPG, and Indie): closest matches first, and among equally close ones the better-known games.

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

Balatro
Shared: Card Game · Deckbuilding · Indie

Across the Obelisk
Shared: Casual · Card Game · Adventure

Gordian Quest
Shared: Card Game · Card Battler · RPG

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

Overdungeon
Shared: Indie · Card Battler · RPG

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

Roguebook
Shared: Card Game · RPG · Deckbuilding

Inscryption
Shared: Card Battler · Card Game · Deckbuilding

Griftlands
Shared: Card Battler · Deckbuilding · RPG

Hand of Fate
Shared: Deckbuilding · Card Game · RPG

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

9 Kings
Shared: RPG · Card Game · Deckbuilding

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

Melvor Idle
Shared: RPG · Indie · Casual

Cross Blitz
Shared: Deckbuilding · Card Game · Card Battler

Dungeons & Degenerate Gamblers
Shared: Card Game · Card Battler · Deckbuilding

NEOVERSE
Shared: Card Battler · Deckbuilding · Card Game

Deck of Ashes
Shared: Card Battler · RPG · Deckbuilding

Hand of Fate 2
Shared: Card Game · RPG · Deckbuilding

Book of Demons
Shared: RPG · Deckbuilding · Card Game

Card City Nights
Shared: Card Battler · Card Game · Deckbuilding

Dicey Dungeons
Shared: Card Battler · Deckbuilding · Indie

DICEOMANCER
Shared: Card Game · Card Battler · Deckbuilding