Games like Bitter Heaven
Games like Bitter Heaven include Rabi-Ribi, Nyaruru Fishy Fight, Momodora: Reverie Under The Moonlight, Afterimage, and Webbed. We matched them by the tags players give Bitter Heaven on Steam (2D Platformer, Bullet Hell, Exploration, Anime, and Female Protagonist): closest matches first, and among equally close ones the better-known games.

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

Nyaruru Fishy Fight
Shared: 2D Platformer · Anime · Exploration

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

Afterimage
Shared: 2D Platformer · Female Protagonist · Anime

Webbed
Shared: 2D Platformer · Cute · Exploration

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

TEVI
Shared: Bullet Hell · Anime · Female Protagonist

Celeste
Shared: 2D Platformer · Pixel Graphics · Female Protagonist

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

Record of Lodoss War-Deedlit in Wonder Labyrinth-
Shared: Exploration · Female Protagonist · Anime

SANABI
Shared: 2D Platformer · Pixel Graphics · Action

Mina the Hollower
Shared: 2D Platformer · Female Protagonist · Action-Adventure

Glimmer in Mirror
Shared: Anime · 2D Platformer · Exploration

Rise of the Tomb Raider™
Shared: Female Protagonist · Exploration · Action

Last Command
Shared: Bullet Hell · Anime · Cute

Tomb Raider Game of the Year
Shared: Female Protagonist · Exploration · Action

Shantae and the Seven Sirens
Shared: Female Protagonist · Cute · Anime

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

Dungeon Munchies
Shared: Anime · Pixel Graphics · Action

Gal Guardians: Demon Purge
Shared: 2D Platformer · Anime · Action

Kena: Bridge of Spirits
Shared: Female Protagonist · Exploration · Action-Adventure

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

Slime Rancher
Shared: Exploration · Cute · Adventure

Momodora: Moonlit Farewell
Shared: Anime · Pixel Graphics · Female Protagonist