Games like Loop of Agony
Games like Loop of Agony include Celeste, Super Meat Boy, Katana ZERO, SANABI, and VVVVVV. We matched them by the tags players give Loop of Agony on Steam (Action, Platformer, 2D Platformer, Runner, and Precision Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Platformer · 2D Platformer

Super Meat Boy
Shared: Platformer · Precision Platformer · 2D Platformer

Katana ZERO
Shared: Action · Platformer · Pixel Graphics

SANABI
Shared: Action · 2D Platformer · Pixel Graphics

VVVVVV
Shared: Platformer · Precision Platformer · 2D Platformer

Skul: The Hero Slayer
Shared: Action · Pixel Graphics · Platformer

Pizza Tower
Shared: 2D Platformer · Platformer · Action

Downwell
Shared: Precision Platformer · Platformer · Pixel Graphics

Gravity Circuit
Shared: Action · Platformer · 2D Platformer

Jump King
Shared: Precision Platformer · Platformer · Action

Broforce
Shared: Action · Platformer · Pixel Graphics

Shovel Knight: Treasure Trove
Shared: Platformer · Pixel Graphics · Action

Rogue Legacy
Shared: Platformer · Action · 2D

Super Meat Boy Forever
Shared: Action · Platformer · Precision Platformer

Ambidextro
Shared: Action · 2D Platformer · Precision Platformer

Rain World
Shared: Platformer · Survival · Pixel Graphics

BlazBlue Entropy Effect
Shared: Action · Platformer · 2D

The Messenger
Shared: Platformer · Action · Pixel Graphics

Dust: An Elysian Tail
Shared: Action · Platformer · 2D

Webbed
Shared: 2D Platformer · Pixel Graphics · Platformer

NINJA GAIDEN: Ragebound
Shared: Action · Platformer · 2D Platformer

The End Is Nigh
Shared: Platformer · Precision Platformer · Action

Terraria
Shared: 2D · Survival · Pixel Graphics

Owlboy
Shared: Platformer · Pixel Graphics · 2D