Games like Rapis The Bullet
Games like Rapis The Bullet include Vampire Survivors, Rabi-Ribi, DRAINUS, Dungeon Munchies, and ICEY. We matched them by the tags players give Rapis The Bullet on Steam (Action, Shooter, Bullet Hell, Female Protagonist, and Post-apocalyptic): closest matches first, and among equally close ones the better-known games.

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

Rabi-Ribi
Shared: Bullet Hell · Female Protagonist · Pixel Graphics

DRAINUS
Shared: Action · Shooter · Female Protagonist

Dungeon Munchies
Shared: Action · Pixel Graphics · Indie

ICEY
Shared: Action · Female Protagonist · Anime

Bright Memory: Infinite
Shared: Action · Female Protagonist · Shooter

Touhou Koumakyou: New Classic - the Embodiment of Scarlet Devil
Shared: Bullet Hell · Female Protagonist · Action

Nuclear Throne
Shared: Action · Bullet Hell · Pixel Graphics

LUFTRAUSERS
Shared: Bullet Hell · Action · Pixel Graphics

Enter the Gungeon
Shared: Bullet Hell · Pixel Graphics · Action

Broforce
Shared: Action · Pixel Graphics · Shooter

BlazBlue Entropy Effect
Shared: Action · 2D · Pixel Graphics

Angel at Dusk
Shared: Action · Shooter · Bullet Hell

Bright Memory
Shared: Female Protagonist · Shooter · Action

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

TEVI
Shared: Bullet Hell · Pixel Graphics · Female Protagonist

Exit the Gungeon
Shared: Action · Bullet Hell · Pixel Graphics

The Final Station
Shared: Post-apocalyptic · Pixel Graphics · Action

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

永远消失的幻想乡 ~ The Disappearing of Gensokyo
Shared: Bullet Hell · Female Protagonist · Action

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

Marfusha:Sentinel Girls
Shared: Female Protagonist · Shooter · Pixel Graphics

Touhou Juuouen 〜 Unfinished Dream of All Living Ghost.
Shared: Action · Bullet Hell · Shooter

Touhou Kouryudou ~ Unconnected Marketeers.
Shared: Action · Bullet Hell · Shooter