Games like Alonitaire
Games like Alonitaire include Balatro, Slay the Spire, Slay the Spire 2, Inscryption, and Loop Hero. We matched them by the tags players give Alonitaire on Steam (Card Game, Roguelike, Deckbuilding, Roguelite, and Indie): closest matches first, and among equally close ones the better-known games.

Balatro
Shared: Card Game · Roguelike · Deckbuilding

Slay the Spire
Shared: Card Game · Roguelike · Deckbuilding

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

Inscryption
Shared: Card Game · Deckbuilding · Roguelike

Loop Hero
Shared: Roguelike · Deckbuilding · Roguelite

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

The Binding of Isaac: Rebirth
Shared: Roguelike · Indie · Singleplayer

9 Kings
Shared: Roguelike · Card Game · Deckbuilding

Vampire Survivors
Shared: Roguelite · Roguelike · Indie

Dicey Dungeons
Shared: Deckbuilding · Roguelike · Roguelite

Stacklands
Shared: Card Game · Roguelite · Strategy

Dead Cells
Shared: Roguelike · Roguelite · 2D

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

Roguebook
Shared: Card Game · Deckbuilding · Indie

Peglin
Shared: Roguelike · Deckbuilding · Roguelite

Griftlands
Shared: Deckbuilding · Roguelite · Card Game

Skul: The Hero Slayer
Shared: Indie · Roguelike · Roguelite

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

Library Of Ruina
Shared: Card Game · Deckbuilding · Strategy

Ballionaire
Shared: Roguelike · Deckbuilding · Singleplayer

Ratropolis
Shared: Deckbuilding · Roguelite · Card Game

Nubby's Number Factory
Shared: Roguelike · Strategy · Deckbuilding

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

Black Jacket
Shared: Card Game · Roguelike · Deckbuilding