Games like Leavers Rift
Games like Leavers Rift include Slay the Spire, Balatro, Slay the Spire 2, Dicey Dungeons, and Inscryption. We matched them by the tags players give Leavers Rift on Steam (Roguelike Deckbuilder, Dark Fantasy, Deckbuilding, Card Battler, and Singleplayer): closest matches first, and among equally close ones the better-known games.

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

Balatro
Shared: Roguelike Deckbuilder · Deckbuilding · Roguelike

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

Dicey Dungeons
Shared: Roguelike Deckbuilder · Deckbuilding · Card Battler

Inscryption
Shared: Card Battler · Deckbuilding · Card Game

Knock on the Coffin Lid
Shared: Dark Fantasy · Roguelike Deckbuilder · Card Battler

Hand of Fate
Shared: Roguelike Deckbuilder · Deckbuilding · Roguelike

Wildfrost
Shared: Roguelike Deckbuilder · Card Battler · Deckbuilding

9 Kings
Shared: Roguelike Deckbuilder · Deckbuilding · Roguelike

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

Dungeons & Degenerate Gamblers
Shared: Roguelike Deckbuilder · Deckbuilding · Roguelike

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

DICEOMANCER
Shared: Roguelike Deckbuilder · Card Battler · Deckbuilding

Monster Train
Shared: Card Battler · Deckbuilding · Roguelike

Across the Obelisk
Shared: Roguelike Deckbuilder · Deckbuilding · Roguelike

Book of Demons
Shared: Roguelike Deckbuilder · Deckbuilding · Singleplayer

Black Jacket
Shared: Roguelike Deckbuilder · Deckbuilding · Roguelike

Monster Train 2
Shared: Roguelike Deckbuilder · Deckbuilding · Roguelike

Menace from the Deep
Shared: Roguelike Deckbuilder · Deckbuilding · Card Battler

Super Fantasy Kingdom
Shared: Roguelike · Roguelike Deckbuilder · Deckbuilding

Tainted Grail: Conquest
Shared: Deckbuilding · Dark Fantasy · Roguelike

Vault of the Void
Shared: Roguelike Deckbuilder · Deckbuilding · Card Battler

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

Roguebook
Shared: Deckbuilding · Singleplayer · Card Game