Games like ChainStaff
Games like ChainStaff include Prince of Persia The Lost Crown, SHINOBI: Art of Vengeance, Blasphemous 2, Nine Sols, and SANABI. We matched them by the tags players give ChainStaff on Steam (Action, Combat, 2D Platformer, Side Scroller, and Metroidvania): closest matches first, and among equally close ones the better-known games.

Prince of Persia The Lost Crown
Shared: Action · 2D Platformer · Metroidvania

SHINOBI: Art of Vengeance
Shared: Action · 2D Platformer · Metroidvania

Blasphemous 2
Shared: Combat · Metroidvania · 2D Platformer

Nine Sols
Shared: Metroidvania · Action · Hand-drawn

SANABI
Shared: Action · 2D Platformer · Retro

F.I.S.T.: Forged In Shadow Torch
Shared: Action · Metroidvania · 2D Platformer

The Messenger
Shared: Retro · Metroidvania · Action

Momodora: Reverie Under The Moonlight
Shared: 2D Platformer · Metroidvania · Side Scroller

Ghost Song
Shared: Action · Metroidvania · Sci-fi

Hollow Knight
Shared: Metroidvania · Action · 2D

DEVIATOR
Shared: Action · Metroidvania · 2D Platformer

Axiom Verge
Shared: Metroidvania · Action · Sci-fi

Worldless
Shared: 2D Platformer · Metroidvania · Stylized

Bloodstained: Curse of the Moon
Shared: Action · Retro · Metroidvania

Terminator 2D: NO FATE
Shared: 2D Platformer · Side Scroller · Action

DR LIVESEY ROM AND DEATH EDITION
Shared: Action · Hand-drawn · Retro

Castlevania Advance Collection
Shared: Action · 2D Platformer · Metroidvania

NINJA GAIDEN: Ragebound
Shared: Action · 2D Platformer · Side Scroller

Ghosts 'n Goblins Resurrection
Shared: Action · 2D Platformer · Side Scroller

Dome Keeper
Shared: Action · Combat · Sci-fi

Gato Roboto
Shared: Action · Metroidvania · Retro

Guns of Fury
Shared: Metroidvania · Retro · 2D Platformer

Black Myth: Wukong
Shared: Action · Combat · Atmospheric

Ultros
Shared: Metroidvania · 2D Platformer · Action