Games like Gauntler
Games like Gauntler include Celeste, SANABI, Downwell, Super Meat Boy, and Sonic Origins. We matched them by the tags players give Gauntler on Steam (Action, Adventure, Arcade, Platformer, and 2D Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Platformer · 2D Platformer

SANABI
Shared: Action · Adventure · 2D Platformer

Downwell
Shared: Precision Platformer · Platformer · Arcade

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

Sonic Origins
Shared: Action · Adventure · 2D Platformer

Rogue Legacy 2
Shared: Arcade · Action · Platformer

Katana ZERO
Shared: Action · Platformer · Pixel Graphics

VVVVVV
Shared: Platformer · Precision Platformer · 2D Platformer

Pizza Tower
Shared: 2D Platformer · Platformer · Action

Geometry Dash
Shared: 2D · Precision Platformer · Platformer

Jump King
Shared: Adventure · Precision Platformer · Action

Broforce
Shared: Action · Platformer · 2D

Sonic Mania
Shared: Platformer · 2D · Adventure

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

Exit the Gungeon
Shared: Action · Arcade · Adventure

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

Sonic Superstars
Shared: Action · Adventure · Platformer

Super Mombo Quest
Shared: Action · Adventure · Arcade

UFO 50
Shared: Action · Arcade · Adventure

Vampire Survivors
Shared: 2D · Pixel Graphics · Action

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

Janosik
Shared: Action · Adventure · Platformer

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

Rogue Legacy
Shared: Platformer · Action · Indie