Games like Ollie Ninja Slash
Games like Ollie Ninja Slash include Celeste, SANABI, Katana ZERO, Gensokyo Night Festival, and pureya. We matched them by the tags players give Ollie Ninja Slash on Steam (Pixel Graphics, Casual, Action, Platformer, and Female Protagonist): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Pixel Graphics · Platformer · Female Protagonist

SANABI
Shared: Pixel Graphics · Action · 2D Platformer

Katana ZERO
Shared: Pixel Graphics · Action · Platformer

Gensokyo Night Festival
Shared: Pixel Graphics · Action · Casual

pureya
Shared: Casual · Arcade · Singleplayer

Broforce
Shared: Pixel Graphics · Action · Platformer

Pizza Tower
Shared: 2D Platformer · Pixel Graphics · Platformer

Skul: The Hero Slayer
Shared: Action · Pixel Graphics · Platformer

Vampire Survivors
Shared: Pixel Graphics · Casual · Singleplayer

Sonic Origins
Shared: Action · Pixel Graphics · 2D Platformer

Timberman
Shared: Pixel Graphics · Casual · Action

The Messenger
Shared: Pixel Graphics · Platformer · Action

Momodora: Reverie Under The Moonlight
Shared: Pixel Graphics · 2D Platformer · Female Protagonist

Super Meat Boy
Shared: Platformer · Pixel Graphics · 2D Platformer

Rabi-Ribi
Shared: Pixel Graphics · Female Protagonist · Action

Shovel Knight: Treasure Trove
Shared: Pixel Graphics · Platformer · Action

NINJA GAIDEN: Ragebound
Shared: Action · Pixel Graphics · Platformer

Planet of Lana
Shared: Action · Female Protagonist · 2D Platformer

Sonic Mania
Shared: Platformer · Pixel Graphics · 2D

Downwell
Shared: Pixel Graphics · Platformer · Action

Twin Shot Deluxe
Shared: Casual · Action · Pixel Graphics

Muse Dash
Shared: Casual · Female Protagonist · Singleplayer

Bloodstained: Curse of the Moon
Shared: Pixel Graphics · Action · Platformer

Freedom Planet
Shared: Platformer · Action · Pixel Graphics