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

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

Balatro
Shared: Roguelike · Card Game · Strategy

Slay the Spire
Shared: Roguelike · Card Game · Strategy

Loop Hero
Shared: Roguelike · Deckbuilding · Card Game

Inscryption
Shared: Card Game · Roguelike · Deckbuilding

Stacklands
Shared: Card Game · Strategy · Management

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

9 Kings
Shared: Strategy · Roguelike · Card Game

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

Oxygen Not Included
Shared: Resource Management · Strategy · 2D

Ratropolis
Shared: Strategy · Deckbuilding · 2D

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

Dicey Dungeons
Shared: Roguelike · Deckbuilding · Strategy

Stoneshard
Shared: Roguelike · Strategy · 2D

Slots & Daggers
Shared: Strategy · Roguelike · Dark Fantasy

Tainted Grail: Conquest
Shared: Roguelike · Dark Fantasy · Card Game

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

DICEOMANCER
Shared: Strategy · Card Game · Roguelike

Roguebook
Shared: Card Game · Strategy · Deckbuilding

Darkest Dungeon®
Shared: Roguelike · Dark Fantasy · Strategy

Super Fantasy Kingdom
Shared: Strategy · Roguelike · Card Game

天外武林 (Traveler of Wuxia)
Shared: Roguelike · Deckbuilding · Card Game

Library Of Ruina
Shared: Strategy · Card Game · Deckbuilding

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