Games like Seekers of Eclipse
Games like Seekers of Eclipse include Slay the Spire, Balatro, Slay the Spire 2, Dicey Dungeons, and Wildfrost. We matched them by the tags players give Seekers of Eclipse on Steam (Roguelike Deckbuilder, Card Game, City Builder, Roguelike, and Resource Management): closest matches first, and among equally close ones the better-known games.

Slay the Spire
Shared: Roguelike Deckbuilder · Card Game · Roguelike

Balatro
Shared: Card Game · Roguelike Deckbuilder · Roguelike

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

Dicey Dungeons
Shared: Roguelike Deckbuilder · Roguelike · Deckbuilding

Wildfrost
Shared: Roguelike Deckbuilder · Card Game · Roguelike

9 Kings
Shared: Card Game · Roguelike · Roguelike Deckbuilder

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

Black Jacket
Shared: Roguelike Deckbuilder · Card Game · Roguelike

Combolands: Roguelike Citybuilder
Shared: City Builder · Roguelike Deckbuilder · Roguelike

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

Yao-Guai Hunter
Shared: Roguelike Deckbuilder · Card Game · Roguelike

Monster Train 2
Shared: Roguelike Deckbuilder · Card Game · Roguelike

Roguebook
Shared: Card Game · Deckbuilding · Singleplayer

My Card Is Better Than Your Card!
Shared: Card Game · Roguelike · Roguelike Deckbuilder

Guild of Dungeoneering Ultimate Edition
Shared: Roguelike Deckbuilder · Roguelike · Card Game

Astrea: Six-Sided Oracles
Shared: Roguelike Deckbuilder · Card Game · Roguelike

Monster Train
Shared: Card Game · Roguelike · Deckbuilding

Hand of Fate
Shared: Roguelike Deckbuilder · Card Game · Roguelike

Loop Hero
Shared: Roguelike · Deckbuilding · Card Game

Luck be a Landlord
Shared: Roguelike Deckbuilder · Deckbuilding · Roguelike

DICEOMANCER
Shared: Card Game · Roguelike Deckbuilder · Strategy

Knock on the Coffin Lid
Shared: Roguelike Deckbuilder · Card Game · Roguelike

Commander Quest
Shared: Roguelike Deckbuilder · Card Game · Roguelike

Super Fantasy Kingdom
Shared: Roguelike · Card Game · Roguelike Deckbuilder