Games like Umbra Lumen
Games like Umbra Lumen include Slay the Spire, Balatro, Slay the Spire 2, 9 Kings, and Die in the Dungeon. We matched them by the tags players give Umbra Lumen on Steam (Falling Blocks, Strategy, Roguelike, Indie, and Difficult): closest matches first, and among equally close ones the better-known games.

Slay the Spire
Shared: Roguelike · Strategy · Roguelike Deckbuilder

Balatro
Shared: Roguelike · Strategy · Roguelike Deckbuilder

Slay the Spire 2
Shared: Roguelike · Strategy · Deckbuilding

9 Kings
Shared: Strategy · Roguelike · Roguelike Deckbuilder

Die in the Dungeon
Shared: Strategy · Roguelike · Indie

Dicey Dungeons
Shared: Roguelike · Roguelike Deckbuilder · Indie

Monster Train
Shared: Roguelike · Roguelite · Strategy

Wildfrost
Shared: Difficult · Roguelike Deckbuilder · Roguelike

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

Super Fantasy Kingdom
Shared: Strategy · Roguelike · Roguelite

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

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

Astrea: Six-Sided Oracles
Shared: Roguelike · Strategy · Roguelike Deckbuilder

Breachway
Shared: Strategy · Roguelike · Roguelike Deckbuilder

Roguebook
Shared: Indie · Strategy · Roguelike

LONESTAR
Shared: Strategy · Roguelike · Roguelike Deckbuilder

FTL: Faster Than Light
Shared: Roguelike · Strategy · Indie

Chrono Ark
Shared: Strategy · Indie · Roguelike Deckbuilder

Inscryption
Shared: Roguelike · Strategy · Card Game

Darkest Dungeon®
Shared: Roguelike · Difficult · Strategy

He is Coming
Shared: Strategy · Roguelike · Roguelite

Shogun Showdown
Shared: Roguelike · Replay Value · Strategy

Griftlands
Shared: Roguelite · Strategy · Deckbuilding

Deathless. The Hero Quest
Shared: Difficult · Replay Value · Strategy