Games like Netherworld Covenant
Games like Netherworld Covenant include Hades, Hades II, Black Myth: Wukong, Wolcen: Lords of Mayhem, and Moonlighter. We matched them by the tags players give Netherworld Covenant on Steam (Action, Roguelike, Roguelite, Hack and Slash, and RPG): closest matches first, and among equally close ones the better-known games.

Hades
Shared: Roguelite · Hack and Slash · Action

Hades II
Shared: Action · Roguelike · Roguelite

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

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

Moonlighter
Shared: Hack and Slash · Roguelite · Roguelike

Halls of Torment
Shared: Roguelite · Action Roguelike · Roguelike

Cinderia
Shared: Roguelite · Roguelike · Hack and Slash

Soulstone Survivors
Shared: Roguelite · Roguelike · Action Roguelike

Heroes of Hammerwatch II
Shared: Action · RPG · Roguelike

Grim Dawn
Shared: Hack and Slash · RPG · Action RPG

Dead Cells
Shared: Roguelike · Action Roguelike · Roguelite

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

Death Must Die
Shared: Roguelite · Action Roguelike · Action

Path of Exile 2
Shared: Hack and Slash · RPG · Action

Last Epoch
Shared: Hack and Slash · RPG · Action

Ravenswatch
Shared: Roguelike · Action · Action Roguelike

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

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

Megabonk
Shared: Roguelike · Roguelite · Action Roguelike

Gunfire Reborn
Shared: Roguelike · Roguelite · Action

Jotunnslayer: Hordes of Hel
Shared: Roguelite · Action Roguelike · Hack and Slash

Vampire Survivors
Shared: Roguelite · Action Roguelike · Roguelike

SWORN
Shared: Roguelite · Action · Hack and Slash

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