Games like Diceheart
Games like Diceheart include Slay the Spire 2, Darkest Dungeon® II, Slay the Spire, Balatro, and Darkest Dungeon®. We matched them by the tags players give Diceheart on Steam (Singleplayer, Strategy, Roguelike, Roguelite, and Tactical): closest matches first, and among equally close ones the better-known games.

Slay the Spire 2
Shared: Roguelike · Strategy · Deckbuilding

Darkest Dungeon® II
Shared: Roguelite · Singleplayer · Turn-Based Tactics

Slay the Spire
Shared: Roguelike · Strategy · Singleplayer

Balatro
Shared: Roguelike · Singleplayer · Strategy

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

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

Loop Hero
Shared: Roguelike · Tactical · Roguelite

Warriors of the Nile
Shared: Strategy · Singleplayer · Roguelite

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

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

XCOM 2
Shared: Strategy · Tactical · Turn-Based Combat

The Last Spell
Shared: Strategy · Singleplayer · Tactical

Into the Breach
Shared: Strategy · Roguelike · Turn-Based Tactics

Die in the Dungeon
Shared: Strategy · Roguelike · Turn-Based Combat

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

9 Kings
Shared: Strategy · Roguelike · Roguelite

Peglin
Shared: Roguelike · Roguelite · Strategy

The Binding of Isaac: Rebirth
Shared: Roguelike · Singleplayer · Dungeon Crawler

Roguebook
Shared: Singleplayer · Strategy · Roguelite

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

Super Fantasy Kingdom
Shared: Strategy · Roguelike · Roguelite

Warhammer 40,000: Mechanicus
Shared: Strategy · Singleplayer · Turn-Based Combat

Mewgenics
Shared: Roguelite · Turn-Based Tactics · Turn-Based Combat

He is Coming
Shared: Strategy · Roguelike · Roguelite