Games like 東方剛欲異聞 ~ 水没した沈愁地獄
Games like 東方剛欲異聞 ~ 水没した沈愁地獄 include Vampire Survivors, ICEY, Skul: The Hero Slayer, Gensokyo Night Festival, and Rabi-Ribi. We matched them by the tags players give 東方剛欲異聞 ~ 水没した沈愁地獄 on Steam (Action, Bullet Hell, Indie, 2D, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

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

ICEY
Shared: Action · Indie · Female Protagonist

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

Gensokyo Night Festival
Shared: Action · Indie · Pixel Graphics

Rabi-Ribi
Shared: Bullet Hell · Pixel Graphics · Indie

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

Celeste
Shared: Indie · Pixel Graphics · 2D

Touhou Fuujinroku ~ Mountain of Faith.
Shared: Action · Indie · Bullet Hell

Katana ZERO
Shared: Action · Pixel Graphics · Indie

SANABI
Shared: Action · Pixel Graphics · 2D

DELTARUNE
Shared: Pixel Graphics · Bullet Hell · Singleplayer

Dungeon Munchies
Shared: Action · Indie · Pixel Graphics

Hotline Miami
Shared: Action · Indie · Pixel Graphics

LUFTRAUSERS
Shared: Bullet Hell · Indie · Action

Undertale
Shared: Pixel Graphics · Indie · Great Soundtrack

TouHou Makuka Sai ~ Fantastic Danmaku Festival Part II
Shared: Bullet Hell · Indie · Action

Hollow Knight: Silksong
Shared: Indie · 2D · Singleplayer

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

TEVI
Shared: Bullet Hell · Pixel Graphics · 2D

Touhou Tenkuushou ~ Hidden Star in Four Seasons.
Shared: Bullet Hell · Indie · Singleplayer

Freedom Planet
Shared: Action · 2D · Indie

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

Broforce
Shared: Action · Pixel Graphics · 2D

Gravity Circuit
Shared: Action · Indie · 2D