Games like Sundy Stairway
Games like Sundy Stairway include NEEDY STREAMER OVERLOAD, Persona 5 Royal, Persona 4 Golden, The NOexistenceN of you AND me, and Doki Doki Literature Club Plus!. We matched them by the tags players give Sundy Stairway on Steam (Psychological Horror, Story Rich, Turn-Based Combat, 2D, and Anime): closest matches first, and among equally close ones the better-known games.

NEEDY STREAMER OVERLOAD
Shared: Psychological Horror · Anime · Visual Novel

Persona 5 Royal
Shared: Story Rich · Turn-Based Combat · JRPG

Persona 4 Golden
Shared: Story Rich · JRPG · Turn-Based Combat

The NOexistenceN of you AND me
Shared: Psychological Horror · Story Rich · Visual Novel

Doki Doki Literature Club Plus!
Shared: Psychological Horror · Anime · Visual Novel

OMORI
Shared: Psychological Horror · Story Rich · 2D

MiSide
Shared: Psychological Horror · Story Rich · Cute

Metaphor: ReFantazio
Shared: Turn-Based Combat · Story Rich · Anime

Persona 3 Reload
Shared: Story Rich · Anime · JRPG

Milk outside a bag of milk outside a bag of milk
Shared: Psychological Horror · Story Rich · Visual Novel

Danganronpa: Trigger Happy Havoc
Shared: Story Rich · Anime · Visual Novel

Clair Obscur: Expedition 33
Shared: Story Rich · Turn-Based Combat · JRPG

Raging Loop
Shared: Psychological Horror · Story Rich · Visual Novel

Danganronpa 2: Goodbye Despair
Shared: Anime · Story Rich · Psychological Horror

The Hungry Lamb: Traveling in the Late Ming Dynasty
Shared: Story Rich · Visual Novel · Anime

BLACK SOULS
Shared: Story Rich · Psychological Horror · Cute

FINAL FANTASY X/X-2 HD Remaster
Shared: Story Rich · Turn-Based Combat · JRPG

Library Of Ruina
Shared: Story Rich · Turn-Based Combat · Psychological Horror

Fox Hime Zero
Shared: Anime · Visual Novel · Cute

Lucy -The Eternity She Wished For-
Shared: Story Rich · Anime · Visual Novel

The Legend of Heroes: Trails of Cold Steel
Shared: Story Rich · Anime · JRPG

Higurashi When They Cry Hou - Ch.1 Onikakushi
Shared: Story Rich · Anime · Visual Novel

ATRI -My Dear Moments-
Shared: Story Rich · Anime · Visual Novel

Persona 3 Portable
Shared: Story Rich · Turn-Based Combat · JRPG