Games like Plug Me
Games like Plug Me include Celeste, Skul: The Hero Slayer, Hollow Knight, Hollow Knight: Silksong, and SANABI. We matched them by the tags players give Plug Me on Steam (Indie, Action, Adventure, Puzzle Platformer, and 2D): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Indie · Pixel Graphics · Difficult

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

Hollow Knight
Shared: Indie · Platformer · 2D

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

SANABI
Shared: Action · Adventure · Pixel Graphics

LIMBO
Shared: Indie · Puzzle Platformer · Platformer

Super Meat Boy
Shared: Indie · Platformer · 2D

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

MO:Astray
Shared: Indie · Action · Adventure

Out There Somewhere
Shared: Indie · Adventure · Platformer

Katana ZERO
Shared: Action · Indie · Pixel Graphics

Jump King
Shared: Indie · Adventure · Action

Dead Cells
Shared: Adventure · 2D · Pixel Graphics

The Binding of Isaac: Rebirth
Shared: Indie · Pixel Graphics · Difficult

Pizza Tower
Shared: Indie · Platformer · Action

Blasphemous
Shared: Indie · 2D · Pixel Graphics

Owlboy
Shared: Indie · Adventure · Pixel Graphics

Dust: An Elysian Tail
Shared: Action · Indie · Adventure

Hyper Light Drifter
Shared: Indie · Adventure · Action

Iconoclasts
Shared: Indie · Action · Adventure

BlazBlue Entropy Effect
Shared: Action · 2D · Platformer

Defy Gravity Extended
Shared: Indie · Puzzle Platformer · Platformer

Gato Roboto
Shared: Indie · Action · Adventure

Dungeon Munchies
Shared: Indie · Action · Adventure