Games like Moonlit Reaper
Games like Moonlit Reaper include Hades, Hades II, Megabonk, Skul: The Hero Slayer, and Vampire Survivors. We matched them by the tags players give Moonlit Reaper on Steam (Action, Casual, Hack and Slash, Roguelite, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Hades
Shared: Hack and Slash · Roguelite · Action

Hades II
Shared: Action · Hack and Slash · Roguelite

Megabonk
Shared: Roguelite · Action · Indie

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

Vampire Survivors
Shared: Roguelite · Casual · Singleplayer

Cinderia
Shared: Hack and Slash · Action · Roguelite

Jotunnslayer: Hordes of Hel
Shared: Hack and Slash · Roguelite · Casual

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

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

Balatro
Shared: Singleplayer · Roguelite · Replay Value

Brotato
Shared: Singleplayer · Roguelike · Roguelite

Ravenswatch
Shared: Action · Roguelite · Roguelike

Dead Cells
Shared: Roguelite · Hack and Slash · Roguelike

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

The Binding of Isaac: Rebirth
Shared: Replay Value · Indie · Singleplayer

We Who Are About To Die
Shared: Action · Roguelite · Singleplayer

Bastion
Shared: Action · Singleplayer · Hack and Slash

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

SWORN
Shared: Roguelite · Action · Hack and Slash

Soulstone Survivors
Shared: Roguelite · Action · Hack and Slash

Lost in Random: The Eternal Die
Shared: Action · Hack and Slash · Roguelite

Gunfire Reborn
Shared: Roguelite · Action · Roguelike

Last Epoch
Shared: Hack and Slash · Action · Isometric

Diablo® IV
Shared: Hack and Slash · Isometric · Singleplayer