Games like Dungeon Dungeon!
Games like Dungeon Dungeon! include Clair Obscur: Expedition 33, Hades, Solasta: Crown of the Magister, Crown Trick, and Darkest Dungeon®. We matched them by the tags players give Dungeon Dungeon! on Steam (Turn-Based Combat, Party-Based RPG, Roguelite, Replay Value, and Class-Based): closest matches first, and among equally close ones the better-known games.

Clair Obscur: Expedition 33
Shared: Turn-Based Combat · RPG · Party-Based RPG

Hades
Shared: Roguelite · Indie · Roguelike

Solasta: Crown of the Magister
Shared: Turn-Based Combat · RPG · Top-Down

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

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

The Binding of Isaac
Shared: Replay Value · Indie · Roguelike

Slay the Spire 2
Shared: Turn-Based Combat · Roguelike · Roguelite

For The King II
Shared: Party-Based RPG · RPG · Turn-Based Combat

Demeo
Shared: Turn-Based Combat · RPG · Party-Based RPG

Wartales
Shared: Party-Based RPG · Turn-Based Combat · RPG

The Binding of Isaac: Rebirth
Shared: Replay Value · Indie · Roguelike

FINAL FANTASY
Shared: Turn-Based Combat · Party-Based RPG · RPG

Gunfire Reborn
Shared: Roguelite · Roguelike · Indie

Megaloot
Shared: Roguelite · Replay Value · Turn-Based Combat

Chrono Ark
Shared: Roguelite · RPG · Indie

Super Fantasy Kingdom
Shared: Roguelite · RPG · Turn-Based Combat

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

Iratus: Lord of the Dead
Shared: Turn-Based Combat · RPG · Indie

For The King
Shared: RPG · Turn-Based Combat · Roguelike

Romancing SaGa 2: Revenge of the Seven
Shared: Party-Based RPG · Tactical RPG · RPG

9 Kings
Shared: RPG · Turn-Based Combat · Roguelite

Lost Eidolons: Veil of the Witch
Shared: Roguelite · Turn-Based Combat · Tactical RPG

Cassette Beasts
Shared: Turn-Based Combat · Party-Based RPG · RPG

Ruined King: A League of Legends Story™
Shared: Turn-Based Combat · RPG · Party-Based RPG