Games like Up All Night
Games like Up All Night include Tiny Bunny, Firework, The Test, SILENT HILL 2, and No, I'm not a Human. We matched them by the tags players give Up All Night on Steam (Visual Novel, Psychological Horror, 2D, Story Rich, and Horror): closest matches first, and among equally close ones the better-known games.

Tiny Bunny
Shared: Visual Novel · Story Rich · Horror

Firework
Shared: Horror · 2D · Psychological Horror

The Test
Shared: Story Rich · Psychological Horror · Visual Novel

SILENT HILL 2
Shared: Psychological Horror · Story Rich · Horror

No, I'm not a Human
Shared: Psychological Horror · Horror · Story Rich

Raging Loop
Shared: Visual Novel · Psychological Horror · Mystery

The Test: Hypothesis Rising
Shared: Visual Novel · Horror · Psychological Horror

The Coffin of Andy and Leyley
Shared: Visual Novel · Story Rich · Psychological Horror

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

Zero Escape: The Nonary Games
Shared: Visual Novel · Story Rich · Psychological Horror

Slay the Princess — The Pristine Cut
Shared: Visual Novel · Psychological Horror · Story Rich

Zero Escape: Zero Time Dilemma
Shared: Visual Novel · Psychological Horror · Story Rich

Scarlet Hollow
Shared: Visual Novel · Psychological Horror · Horror

Urban Myth Dissolution Center
Shared: Visual Novel · Psychological Horror · 2D

Return to Shironagasu Island
Shared: Visual Novel · Psychological Horror · Horror

Sally Face - Episode One
Shared: Psychological Horror · Story Rich · Horror

OMORI
Shared: Psychological Horror · Story Rich · 2D

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

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

NEEDY STREAMER OVERLOAD
Shared: Psychological Horror · Visual Novel · 2D

The Dark Pictures Anthology: House of Ashes
Shared: Psychological Horror · Horror · Choices Matter

Until Then
Shared: Visual Novel · Story Rich · 2D

The House in Fata Morgana
Shared: Visual Novel · Story Rich · Psychological Horror

STEINS;GATE
Shared: Visual Novel · Story Rich · Choices Matter