Games like The Doppel
Games like The Doppel include SANABI, Skul: The Hero Slayer, Shovel Knight: Treasure Trove, Celeste, and Broforce. We matched them by the tags players give The Doppel on Steam (Indie, Pixel Graphics, Side Scroller, Retro, and Action): closest matches first, and among equally close ones the better-known games.

SANABI
Shared: Pixel Graphics · Action · Indie

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

Shovel Knight: Treasure Trove
Shared: Pixel Graphics · Indie · Retro

Celeste
Shared: Pixel Graphics · Indie · 2D Platformer

Broforce
Shared: Pixel Graphics · Action · Indie

The Messenger
Shared: Retro · Pixel Graphics · Indie

Katana ZERO
Shared: Pixel Graphics · Action · Indie

Super Meat Boy
Shared: Indie · Pixel Graphics · 2D Platformer

Gravity Circuit
Shared: Indie · Pixel Graphics · Action

Pizza Tower
Shared: Indie · 2D Platformer · Pixel Graphics

NINJA GAIDEN: Ragebound
Shared: Action · Pixel Graphics · Side Scroller

LIMBO
Shared: Indie · 2D · Atmospheric

Bloodstained: Curse of the Moon
Shared: Pixel Graphics · Action · Retro

VVVVVV
Shared: Pixel Graphics · Indie · 2D Platformer

Axiom Verge
Shared: Indie · Pixel Graphics · Action

Hotline Miami
Shared: Indie · Pixel Graphics · Action

Papers, Please
Shared: Indie · Pixel Graphics · Retro

Gato Roboto
Shared: Indie · Pixel Graphics · Action

UFO 50
Shared: Indie · Pixel Graphics · Retro

Vampire Survivors
Shared: Pixel Graphics · Indie · 2D

Sonic Mania
Shared: Retro · Pixel Graphics · 2D

Hotline Miami 2: Wrong Number
Shared: Pixel Graphics · Action · Indie

Rain World
Shared: Indie · Pixel Graphics · Atmospheric

Jump King
Shared: Indie · Pixel Graphics · 2D