Games like Dungeon Dueler
Games like Dungeon Dueler include Darkest Dungeon®, Stoneshard, Path of Achra, Moonlighter, and Grim Dawn. We matched them by the tags players give Dungeon Dueler on Steam (RPG, Hack and Slash, Roguelike, Strategy RPG, and Turn-Based Tactics): closest matches first, and among equally close ones the better-known games.

Darkest Dungeon®
Shared: RPG · Roguelike · Dungeon Crawler

Stoneshard
Shared: RPG · Roguelike · Pixel Graphics

Path of Achra
Shared: Roguelike · RPG · Turn-Based Combat

Moonlighter
Shared: Hack and Slash · Roguelike · RPG

Grim Dawn
Shared: Hack and Slash · RPG · Dungeon Crawler

Children of Morta
Shared: Roguelike · Hack and Slash · RPG

Hades II
Shared: Roguelike · Hack and Slash · RPG

The Last Spell
Shared: RPG · Turn-Based Tactics · Singleplayer

Darkest Dungeon® II
Shared: Turn-Based Tactics · Dungeon Crawler · Roguelike

Hades
Shared: Hack and Slash · Roguelike · RPG

Baldur's Gate 3
Shared: RPG · Turn-Based Combat · Character Customization

Wolcen: Lords of Mayhem
Shared: Hack and Slash · RPG · Singleplayer

XCOM 2
Shared: RPG · Turn-Based Combat · Turn-Based Tactics

Torchlight II
Shared: RPG · Hack and Slash · Dungeon Crawler

Elin
Shared: RPG · Roguelike · Character Customization

Megaloot
Shared: RPG · Dungeon Crawler · Roguelike

Hero Siege
Shared: Hack and Slash · RPG · Roguelike

Heroes of Hammerwatch II
Shared: RPG · Roguelike · Dungeon Crawler

Fell Seal: Arbiter's Mark
Shared: RPG · Turn-Based Tactics · Turn-Based Combat

Legend of Keepers: Prologue
Shared: RPG · Roguelike · Dungeon Crawler

Diablo® IV
Shared: Hack and Slash · RPG · Dungeon Crawler

Last Epoch
Shared: Hack and Slash · RPG · Dungeon Crawler

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

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