Games like Slugmania
Games like Slugmania include Slay the Spire 2, Slay the Spire, FTL: Faster Than Light, 9 Kings, and Journey to the West. We matched them by the tags players give Slugmania on Steam (Roguelike, Card Battler, Roguelite, Strategy, and Turn-Based Combat): closest matches first, and among equally close ones the better-known games.

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

Slay the Spire
Shared: Card Battler · Roguelike · Strategy

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

9 Kings
Shared: Roguelike · Strategy · Roguelite

Journey to the West
Shared: Card Battler · Roguelike · Roguelite

Peglin
Shared: Roguelike · Roguelite · Strategy

Monster Train
Shared: Card Battler · Roguelite · Roguelike

Dicey Dungeons
Shared: Card Battler · Roguelike · Roguelite

Balatro
Shared: Roguelike · Strategy · Roguelite

Griftlands
Shared: Card Battler · Roguelite · Strategy

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

Inscryption
Shared: Card Battler · Roguelike · Roguelite

Darkest Dungeon® II
Shared: Roguelite · Roguelike · Turn-Based Combat

Super Fantasy Kingdom
Shared: Roguelike · Strategy · Roguelite

Darkest Dungeon®
Shared: Roguelike · Turn-Based Combat · Strategy

LONESTAR
Shared: Roguelike · Card Battler · Strategy

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

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

Crown Trick
Shared: Roguelike · Turn-Based Combat · Roguelite

Chrono Ark
Shared: Strategy · Roguelite · Party-Based RPG

Home Behind 2
Shared: Roguelike · Strategy · Roguelite

HELLCARD
Shared: Roguelike · Card Battler · Roguelite

Breachway
Shared: Roguelike · Strategy · Card Battler

Morimens
Shared: Card Battler · Roguelite · Strategy