Games like Prisoner
Games like Prisoner include Hollow Knight, The Binding of Isaac: Rebirth, Hollow Knight: Silksong, Celeste, and Rain World. We matched them by the tags players give Prisoner on Steam (Indie, Adventure, Platformer, Dark, and Perma Death): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Platformer · Indie · 2D

The Binding of Isaac: Rebirth
Shared: Indie · Dark · Replay Value

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

Celeste
Shared: Indie · Platformer · Great Soundtrack

Rain World
Shared: Indie · Atmospheric · Platformer

LIMBO
Shared: Indie · Platformer · Dark

GRIS
Shared: Indie · Adventure · Atmospheric

Dead Cells
Shared: Adventure · 2D · Platformer

The Binding of Isaac
Shared: Indie · Dark · Replay Value

Shovel Knight: Treasure Trove
Shared: Platformer · Indie · Adventure

Don't Starve
Shared: Adventure · Indie · Survival

Seen
Shared: Indie · Adventure · Dark

Little Nightmares
Shared: Adventure · Atmospheric · Indie

Hyper Light Drifter
Shared: Indie · Adventure · Atmospheric

Risk of Rain (2013)
Shared: Indie · Platformer · Great Soundtrack

Skul: The Hero Slayer
Shared: Indie · 2D · Platformer

The End Is Nigh
Shared: Indie · Platformer · Adventure

Spelunky
Shared: Platformer · Indie · 2D

OneShot
Shared: Indie · Great Soundtrack · Atmospheric

Ori and the Will of the Wisps
Shared: Platformer · Adventure · Great Soundtrack

Terraria
Shared: Adventure · 2D · Survival

Super Meat Boy
Shared: Platformer · Indie · 2D

Geometry Dash
Shared: 2D · Great Soundtrack · Platformer

FEZ
Shared: Indie · Platformer · Adventure