Games like Blacken Slash
Games like Blacken Slash include Hades, Hades II, Megabonk, Death Must Die, and Jagged Alliance 3. We matched them by the tags players give Blacken Slash on Steam (Hack and Slash, Turn-Based Combat, Action Roguelike, Tactical RPG, and Loot): closest matches first, and among equally close ones the better-known games.

Hades
Shared: Hack and Slash · Action Roguelike · Roguelite

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

Megabonk
Shared: Action Roguelike · Roguelite · Loot

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

Jagged Alliance 3
Shared: Turn-Based Combat · Tactical RPG · Strategy

Cinderia
Shared: Hack and Slash · Action Roguelike · Roguelite

Tower of Babel: Survivors of Chaos
Shared: Action Roguelike · Hack and Slash · Loot

Last Epoch
Shared: Hack and Slash · Loot · Isometric

The Last Spell
Shared: Turn-Based Combat · Tactical RPG · Strategy

Wolcen: Lords of Mayhem
Shared: Hack and Slash · Loot · Isometric

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

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

Path of Exile 2
Shared: Hack and Slash · Loot · Isometric

SWORN
Shared: Hack and Slash · Action Roguelike · Roguelite

Grim Dawn
Shared: Hack and Slash · Loot · Isometric

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

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

Vampire Survivors
Shared: Action Roguelike · Roguelite · Indie

Mortal Sin
Shared: Action Roguelike · Hack and Slash · Roguelite

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

Ravenswatch
Shared: Action Roguelike · Hack and Slash · Roguelite

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

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

Brotato
Shared: Action Roguelike · Hack and Slash · Roguelite