Games like Rummy Odyssey
Games like Rummy Odyssey include Balatro, Slay the Spire, Slay the Spire 2, Dicey Dungeons, and Dungeons & Degenerate Gamblers. We matched them by the tags players give Rummy Odyssey on Steam (Roguelike Deckbuilder, Card Game, Tabletop, Board Game, and Roguelike): closest matches first, and among equally close ones the better-known games.

Balatro
Shared: Card Game · Roguelike Deckbuilder · Roguelike

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

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

Dicey Dungeons
Shared: Roguelike Deckbuilder · Deckbuilding · Roguelike

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

9 Kings
Shared: Card Game · Roguelike Deckbuilder · Roguelike

RACCOIN: Coin Pusher Roguelike
Shared: Roguelike Deckbuilder · Roguelike · Deckbuilding

Demonic Mahjong
Shared: Card Game · Tabletop · Roguelike

UNO
Shared: Card Game · Tabletop · Board Game

Wildfrost
Shared: Roguelike Deckbuilder · Card Game · Deckbuilding

Black Jacket
Shared: Roguelike Deckbuilder · Card Game · Roguelike

DICEOMANCER
Shared: Card Game · Roguelike Deckbuilder · Strategy

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

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

Hand of Fate 2
Shared: Roguelike Deckbuilder · Card Game · Deckbuilding

Monster Train 2
Shared: Roguelike Deckbuilder · Card Game · Roguelike

Hand of Fate
Shared: Roguelike Deckbuilder · Card Game · Roguelike

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

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

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

Commander Quest
Shared: Roguelike Deckbuilder · Card Game · Deckbuilding

Backpack Hero
Shared: Roguelike Deckbuilder · Deckbuilding · Roguelike

Meme Mayhem
Shared: Roguelike Deckbuilder · Card Game · Roguelike

Dicevaders
Shared: Roguelike Deckbuilder · Roguelike · Deckbuilding