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

Slay the Spire 2
Shared: Roguelike · Deckbuilding · Strategy

Balatro
Shared: Roguelike · Deckbuilding · Card Game

Slay the Spire
Shared: Roguelike · Deckbuilding · Card Game

Loop Hero
Shared: Roguelike · Deckbuilding · Tactical

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

9 Kings
Shared: Strategy · Roguelike · Deckbuilding

Inscryption
Shared: Deckbuilding · Card Game · Roguelike

Monster Train
Shared: Deckbuilding · Roguelite · Card Game

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

Die in the Dungeon
Shared: Strategy · Roguelike · Deckbuilding

Griftlands
Shared: Deckbuilding · Roguelite · Strategy

Peglin
Shared: Deckbuilding · Roguelike · Roguelite

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

Dicey Dungeons
Shared: Deckbuilding · Roguelite · Roguelike

Roguebook
Shared: Deckbuilding · Strategy · Card Game

Super Fantasy Kingdom
Shared: Strategy · Roguelike · Roguelite

Dungeons & Degenerate Gamblers
Shared: Strategy · Roguelike · Deckbuilding

Into the Breach
Shared: Strategy · Roguelike · Roguelite

Crying Suns
Shared: Strategy · Roguelite · Roguelike

Cobalt Core
Shared: Strategy · Roguelike · Card Game

Ratropolis
Shared: Deckbuilding · Strategy · Roguelite

Warriors of the Nile
Shared: Strategy · Roguelite · Roguelike

Breachway
Shared: Strategy · Roguelike · Deckbuilding

Wildfrost
Shared: Card Game · Deckbuilding · Roguelite