Games like Assault Spy
Games like Assault Spy include Devil May Cry 5, ICEY, METAL GEAR RISING: REVENGEANCE, Bayonetta, and DmC: Devil May Cry. We matched them by the tags players give Assault Spy on Steam (Action, Character Action Game, Indie, Hack and Slash, and Anime): closest matches first, and among equally close ones the better-known games.

Devil May Cry 5
Shared: Action · Character Action Game · Hack and Slash

ICEY
Shared: Action · Hack and Slash · Anime

METAL GEAR RISING: REVENGEANCE
Shared: Action · Hack and Slash · Character Action Game

Bayonetta
Shared: Action · Hack and Slash · Character Action Game

DmC: Devil May Cry
Shared: Action · Hack and Slash · Spectacle fighter

Hi-Fi RUSH
Shared: Action · Hack and Slash · Character Action Game

NieR:Automata™
Shared: Hack and Slash · Action · Spectacle fighter

Marlow Briggs and the Mask of Death
Shared: Action · Hack and Slash · Character Action Game

Hades
Shared: Indie · Hack and Slash · Action

Dead as Disco
Shared: Hack and Slash · Spectacle fighter · Action

Redeemer: Enhanced Edition
Shared: Action · Indie · Hack and Slash

One Piece Pirate Warriors 3
Shared: Action · Anime · Hack and Slash

ONE PIECE: PIRATE WARRIORS 4
Shared: Hack and Slash · Anime · Action

NINJA GAIDEN 4
Shared: Action · Hack and Slash · Violent

NINJA GAIDEN Σ [NINJA GAIDEN: Master Collection]
Shared: Action · Hack and Slash · Violent

The Initial
Shared: Action · Hack and Slash · Anime

Bright Memory: Infinite
Shared: Action · Indie · Singleplayer

RWBY: Grimm Eclipse
Shared: Hack and Slash · Spectacle fighter · Beat 'em up

Sifu
Shared: Action · Indie · Beat 'em up

Paint the Town Red
Shared: Action · Violent · Fighting

Fairy Bloom Freesia
Shared: Action · Anime · Indie

DRAGON BALL Z: KAKAROT
Shared: Action · Anime · Singleplayer

DRAGON BALL FighterZ
Shared: Action · Anime · Fighting

NARUTO SHIPPUDEN: Ultimate Ninja STORM 4
Shared: Action · Anime · Fighting