Games like Erin and the Otherworld
Games like Erin and the Otherworld include Balatro, Slay the Spire 2, Slay the Spire, RACCOIN: Coin Pusher Roguelike, and Inscryption. We matched them by the tags players give Erin and the Otherworld on Steam (Casual, Mythology, Strategy, Deckbuilding, and Roguelike): closest matches first, and among equally close ones the better-known games.

Balatro
Shared: Roguelike · Card Game · Deckbuilding

Slay the Spire 2
Shared: Roguelike · Deckbuilding · Strategy

Slay the Spire
Shared: Card Game · Deckbuilding · Roguelike

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

Inscryption
Shared: Deckbuilding · Card Game · Roguelike

Across the Obelisk
Shared: Casual · Card Game · Roguelike

Ballionaire
Shared: Casual · Deckbuilding · Roguelike

Demonic Mahjong
Shared: Strategy · Casual · Roguelike

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

9 Kings
Shared: Strategy · Roguelike · Deckbuilding

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

DICEOMANCER
Shared: Strategy · Card Game · Deckbuilding

Dungeons & Degenerate Gamblers
Shared: Strategy · Roguelike · Deckbuilding

Slots & Daggers
Shared: Casual · Strategy · Roguelike

Plants vs. Zombies GOTY Edition
Shared: Strategy · Casual · Singleplayer

Monster Train 2
Shared: Deckbuilding · Roguelike · Card Game

Library Of Ruina
Shared: Strategy · Card Game · Deckbuilding

Dicevaders
Shared: Deckbuilding · Casual · Strategy

Die in the Dungeon
Shared: Strategy · Roguelike · Deckbuilding

FrostBound
Shared: Deckbuilding · Strategy · Roguelike

Zup! S
Shared: Casual · Puzzle · Indie

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

Ratropolis
Shared: Deckbuilding · Strategy · Card Game

Bloons TD 6
Shared: Strategy · Casual · Singleplayer