Games like Rune Coliseum
Games like Rune Coliseum include Slay the Spire 2, Slay the Spire, 9 Kings, Balatro, and Monster Train. We matched them by the tags players give Rune Coliseum on Steam (Turn-Based Combat, Deckbuilding, Strategy RPG, RPG, and Base Building): closest matches first, and among equally close ones the better-known games.

Slay the Spire 2
Shared: Deckbuilding · Roguelike · Turn-Based Combat

Slay the Spire
Shared: Deckbuilding · Card Battler · Roguelike

9 Kings
Shared: RPG · Deckbuilding · Roguelike

Balatro
Shared: Deckbuilding · Roguelike · Card Game

Monster Train
Shared: Deckbuilding · Card Battler · Card Game

Griftlands
Shared: Deckbuilding · Card Battler · RPG

Roguebook
Shared: RPG · Deckbuilding · Card Game

Die in the Dungeon
Shared: Deckbuilding · Turn-Based Combat · Roguelike

Super Fantasy Kingdom
Shared: RPG · Roguelike · Deckbuilding

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

Inscryption
Shared: Deckbuilding · Card Battler · Card Game

Marvels Midnight Suns Digital Edition
Shared: Deckbuilding · Turn-Based Combat · Strategy RPG

Tainted Grail: Conquest
Shared: Deckbuilding · RPG · Roguelike

天外武林 (Traveler of Wuxia)
Shared: Deckbuilding · Roguelike · RPG

Darkest Dungeon®
Shared: Turn-Based Combat · RPG · Roguelike

Peglin
Shared: Deckbuilding · Roguelike · Turn-Based Combat

HELLCARD
Shared: Deckbuilding · Turn-Based Combat · RPG

Shogun Showdown
Shared: Strategy RPG · Roguelike · Turn-Based Combat

As We Descend
Shared: Deckbuilding · Card Battler · Roguelike

Gordian Quest
Shared: RPG · Card Battler · Card Game

Loop Hero
Shared: Deckbuilding · Roguelike · Strategy RPG

Breachway
Shared: Deckbuilding · Turn-Based Combat · Roguelike

Wildfrost
Shared: Card Battler · Deckbuilding · Card Game

Dicey Dungeons
Shared: Deckbuilding · Card Battler · Roguelike