Games like HoPiKo
Games like HoPiKo include Hollow Knight, Hollow Knight: Silksong, Geometry Dash, Cuphead, and Katana ZERO. We matched them by the tags players give HoPiKo on Steam (Indie, Casual, Action, Platformer, and 2D): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Platformer · Indie · Great Soundtrack

Hollow Knight: Silksong
Shared: Indie · Great Soundtrack · Difficult

Geometry Dash
Shared: Difficult · Great Soundtrack · 2D

Cuphead
Shared: Platformer · Difficult · Indie

Katana ZERO
Shared: Action · Great Soundtrack · Platformer

Celeste
Shared: Indie · Great Soundtrack · Difficult

Shovel Knight: Treasure Trove
Shared: Platformer · Indie · Great Soundtrack

Super Meat Boy
Shared: Indie · Platformer · Difficult

Defy Gravity Extended
Shared: Indie · Platformer · Action

Risk of Rain (2013)
Shared: Indie · Platformer · Action

Pizza Tower
Shared: Indie · Great Soundtrack · Platformer

Skul: The Hero Slayer
Shared: Indie · Action · 2D

BEEP
Shared: Indie · Platformer · 2D

Minimalism
Shared: Indie · Casual · Action

Hotline Miami
Shared: Indie · Action · Great Soundtrack

Nine Sols
Shared: Platformer · Action · 2D

Dust: An Elysian Tail
Shared: Action · Indie · Platformer

Super Hexagon
Shared: Indie · Great Soundtrack · Difficult

No Time To Explain Remastered
Shared: Indie · Action · Casual

Super Fancy Pants Adventure
Shared: Indie · Action · Casual

Freedom Planet
Shared: Platformer · Action · Great Soundtrack

Shio
Shared: Indie · Action · Casual

A Dance of Fire and Ice
Shared: Indie · Difficult · 2D

Electronic Super Joy
Shared: Indie · Platformer · Great Soundtrack