Games like Underground Lords
Games like Underground Lords include Halls of Torment, Hero Siege, Death Must Die, Heroes of Hammerwatch II, and Vampire Survivors. We matched them by the tags players give Underground Lords on Steam (Action, RPG, Roguelike, Action Roguelike, and Action RPG): closest matches first, and among equally close ones the better-known games.

Halls of Torment
Shared: Action Roguelike · Roguelike · Action

Hero Siege
Shared: Action RPG · RPG · Action Roguelike

Death Must Die
Shared: Action Roguelike · RPG · Action

Heroes of Hammerwatch II
Shared: RPG · Action Roguelike · Action

Vampire Survivors
Shared: Action Roguelike · Pixel Graphics · 2D

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

Hades II
Shared: Action · Roguelike · Action Roguelike

The Binding of Isaac: Rebirth
Shared: Roguelike · Action Roguelike · Pixel Graphics

Hades
Shared: Action Roguelike · Action · Roguelike

Rogue Legacy
Shared: Roguelike · Action · Action Roguelike

Dead Cells
Shared: Roguelike · Action Roguelike · 2D

Black Myth: Wukong
Shared: Action · RPG · Action RPG

Children of Morta
Shared: Roguelike · Action Roguelike · Pixel Graphics

Dungreed
Shared: Action Roguelike · Roguelike · Action

The Binding of Isaac
Shared: Roguelike · Action Roguelike · Action

Risk of Rain (2013)
Shared: Roguelike · Action Roguelike · Action

Wizard of Legend
Shared: Action Roguelike · Roguelike · Action

Dragon's Dogma 2
Shared: RPG · Action · Action RPG

Sephiria
Shared: Action Roguelike · Roguelike · Action

Streets of Rogue
Shared: Action Roguelike · RPG · Action

Moonlighter
Shared: Roguelike · Pixel Graphics · Action Roguelike

Noita
Shared: Roguelike · Pixel Graphics · 2D

Drova - Forsaken Kin
Shared: RPG · Action RPG · 2D

DARK SOULS™: REMASTERED
Shared: RPG · Action · Action RPG

