Games like Demon Slayer Akagi
Games like Demon Slayer Akagi include Celeste, Vampire Survivors, Rabi-Ribi, Super Meat Boy, and Katana ZERO. We matched them by the tags players give Demon Slayer Akagi on Steam (Bullet Hell, 2D Platformer, Platformer, Arcade, and Female Protagonist): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Platformer · 2D Platformer · Female Protagonist

Vampire Survivors
Shared: Bullet Hell · 2D · Pixel Graphics

Rabi-Ribi
Shared: Bullet Hell · Female Protagonist · Anime

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

Katana ZERO
Shared: Platformer · Action · 2D Platformer

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

Touhou Hero of Ice Fairy
Shared: Bullet Hell · Female Protagonist · Platformer

Pepper Grinder
Shared: 2D Platformer · Platformer · Arcade

Eryi's Action
Shared: 2D Platformer · Platformer · Bullet Hell

Exit the Gungeon
Shared: Arcade · Bullet Hell · Action

SANABI
Shared: 2D Platformer · Action · Pixel Graphics

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

Webbed
Shared: 2D Platformer · Cute · Platformer

Last Command
Shared: Bullet Hell · 2D · Cute

Momodora III
Shared: Platformer · Action · Female Protagonist

Pizza Tower
Shared: 2D Platformer · Platformer · Action

Touhou Luna Nights
Shared: Bullet Hell · Platformer · Female Protagonist

Mina the Hollower
Shared: 2D Platformer · Female Protagonist · Platformer

Freedom Planet
Shared: Platformer · Female Protagonist · Action

Gensokyo Night Festival
Shared: Action · Female Protagonist · Pixel Graphics

Downwell
Shared: Platformer · 2D Platformer · Arcade

Gravity Circuit
Shared: Platformer · Action · 2D Platformer

Annalynn
Shared: Platformer · 2D Platformer · Arcade

Rogue Legacy 2
Shared: Arcade · Platformer · Action