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

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

Monster Train
Shared: Card Battler · Turn-Based Tactics · Deckbuilding

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

Wildfrost
Shared: Card Battler · Roguelike Deckbuilder · Turn-Based Tactics

Balatro
Shared: Roguelike Deckbuilder · Roguelike · Deckbuilding

9 Kings
Shared: Roguelike · Roguelike Deckbuilder · RPG

LONESTAR
Shared: Card Battler · Roguelike · Turn-Based Tactics

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

StarVaders
Shared: Roguelike Deckbuilder · Turn-Based Tactics · Deckbuilding

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

Super Fantasy Kingdom
Shared: Roguelike · RPG · Roguelike Deckbuilder

Monster Train 2
Shared: Roguelike Deckbuilder · Roguelike · Deckbuilding

Alina of the Arena
Shared: Roguelike Deckbuilder · Turn-Based Tactics · Roguelike

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

Dungeons & Degenerate Gamblers
Shared: Roguelike Deckbuilder · Roguelike · Card Battler

Dicey Dungeons
Shared: Card Battler · Roguelike Deckbuilder · Deckbuilding

Touhou: Lost Branch of Legend
Shared: Roguelike Deckbuilder · Card Battler · Roguelike

Roguebook
Shared: Deckbuilding · RPG · Roguelike

Breachway
Shared: Roguelike · Roguelike Deckbuilder · Card Battler

Banners of Ruin
Shared: Card Battler · Roguelike Deckbuilder · Roguelike

SpellRogue
Shared: Roguelike Deckbuilder · Card Battler · Deckbuilding

Shogun Showdown
Shared: Roguelike · Roguelike Deckbuilder · Turn-Based Strategy

He is Coming
Shared: Roguelike · RPG · Strategy

Across the Obelisk
Shared: Roguelike Deckbuilder · Card Battler · Roguelike