Games like RoPos
Games like RoPos include Slay the Spire, Slay the Spire 2, Balatro, Inscryption, and 9 Kings. We matched them by the tags players give RoPos on Steam (Strategy, Card Game, Roguelike, Card Battler, and 2D): closest matches first, and among equally close ones the better-known games.

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

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

Balatro
Shared: Card Game · Roguelike · Strategy

Inscryption
Shared: Card Game · Card Battler · Roguelike

9 Kings
Shared: Strategy · Roguelike · Card Game

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

DICEOMANCER
Shared: Strategy · Card Game · Card Battler

FTL: Faster Than Light
Shared: Strategy · Roguelike · Indie

Die in the Dungeon
Shared: Strategy · Roguelike · Card Game

Ratropolis
Shared: Strategy · 2D · Card Battler

Super Fantasy Kingdom
Shared: Strategy · Roguelike · Card Game

Dungeons & Degenerate Gamblers
Shared: Strategy · Roguelike · Card Game

Dicey Dungeons
Shared: Card Battler · Roguelike · Strategy

Roguebook
Shared: Card Game · Strategy · Indie

Wildfrost
Shared: Card Game · Card Battler · Roguelike

Stacklands
Shared: Card Game · Strategy · Card Battler

GWENT: Rogue Mage (Single-Player Expansion)
Shared: Strategy · Card Game · Roguelike

Breachway
Shared: Strategy · Card Game · Roguelike

Library Of Ruina
Shared: Card Game · Strategy · Indie

The Bazaar
Shared: Strategy · Card Game · Card Battler

He is Coming
Shared: Strategy · Roguelike · Card Game

Monster Train
Shared: Card Game · Card Battler · Roguelike

Griftlands
Shared: Card Battler · Card Game · Strategy

My Card Is Better Than Your Card!
Shared: Card Game · Roguelike · Strategy