Games like Ancient Dungeon
Games like Ancient Dungeon include Hades, Gunfire Reborn, The Binding of Isaac: Rebirth, Hades II, and The Binding of Isaac. We matched them by the tags players give Ancient Dungeon on Steam (Dungeon Crawler, Adventure, Roguelike, Action, and Indie): closest matches first, and among equally close ones the better-known games.

Hades
Shared: Roguelite · Indie · Action

Gunfire Reborn
Shared: Roguelike · Roguelite · Indie

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

Hades II
Shared: Roguelike · Action · Roguelite

The Binding of Isaac
Shared: Roguelike · Indie · Action

UnderMine
Shared: Dungeon Crawler · Roguelite · Adventure

Noita
Shared: Roguelike · Dungeon Crawler · Indie

Wizard of Legend
Shared: Dungeon Crawler · Roguelike · Action

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

Moonlighter
Shared: Dungeon Crawler · Roguelike · Roguelite

Dead Cells
Shared: Adventure · Roguelike · Roguelite

VR Dungeon Knight
Shared: Adventure · VR · Action

Dungreed
Shared: Roguelike · Action · Dungeon Crawler

Streets of Rogue
Shared: Roguelite · Roguelike · Action

Neon Abyss
Shared: Roguelike · Adventure · Procedural Generation

Children of Morta
Shared: Roguelike · Dungeon Crawler · RPG

Delver
Shared: Dungeon Crawler · Indie · RPG

Enter the Gungeon
Shared: Roguelike · Dungeon Crawler · Indie

Dungeon of the ENDLESS™
Shared: Roguelike · Dungeon Crawler · Indie

Skul: The Hero Slayer
Shared: Action · Indie · Roguelike

Dungeon Souls
Shared: Dungeon Crawler · RPG · Action

Crown Trick
Shared: Roguelike · Dungeon Crawler · Adventure

Ravenswatch
Shared: Roguelike · Action · Roguelite

Last Epoch
Shared: RPG · Dungeon Crawler · Action