Games like Molten Horn
Games like Molten Horn include Hades, Hades II, Dead Cells, Skul: The Hero Slayer, and Moonlighter. We matched them by the tags players give Molten Horn on Steam (Action Roguelike, Exploration, Traditional Roguelike, Turn-Based Tactics, and Hack and Slash): closest matches first, and among equally close ones the better-known games.

Hades
Shared: Action Roguelike · Hack and Slash · Roguelite

Hades II
Shared: Action Roguelike · Hack and Slash · Roguelite

Dead Cells
Shared: Action Roguelike · Roguelite · Hack and Slash

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

Moonlighter
Shared: Hack and Slash · Action Roguelike · Roguelite

Vampire Survivors
Shared: Action Roguelike · Roguelite · Indie

Halls of Torment
Shared: Action Roguelike · Roguelite · Hack and Slash

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

Nordic Ashes: Survivors of Ragnarok
Shared: Action Roguelike · Exploration · Roguelite

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

Hero Siege
Shared: Action Roguelike · Hack and Slash · Action RPG

Soulstone Survivors
Shared: Action Roguelike · Roguelite · Hack and Slash

Megabonk
Shared: Action Roguelike · Roguelite · Roguelike

Ravenswatch
Shared: Action Roguelike · Roguelite · Difficult

Death Must Die
Shared: Action Roguelike · Roguelite · Hack and Slash

Lost Castle
Shared: Action Roguelike · Hack and Slash · Roguelite

Moon Hunters
Shared: Action Roguelike · Hack and Slash · Exploration

One Step From Eden
Shared: Action Roguelike · Roguelite · Difficult

Astral Ascent
Shared: Action Roguelike · Hack and Slash · Roguelite

Devil Slayer - Raksasi
Shared: Action Roguelike · Difficult · Roguelite

Risk of Rain 2
Shared: Action Roguelike · Roguelite · Roguelike

Enter the Gungeon
Shared: Action Roguelike · Difficult · Roguelike

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

Curse of the Dead Gods
Shared: Action Roguelike · Roguelite · Difficult