Games like Neon Dungeon
Games like Neon Dungeon include Super Meat Boy, Geometry Dash, SANABI, Shovel Knight: Treasure Trove, and Sonic Mania. We matched them by the tags players give Neon Dungeon on Steam (Action, Platformer, 2D, Minimalist, and Retro): closest matches first, and among equally close ones the better-known games.

Super Meat Boy
Shared: Platformer · 2D · Singleplayer

Geometry Dash
Shared: 2D · Platformer · Singleplayer

SANABI
Shared: Action · 2D · Singleplayer

Shovel Knight: Treasure Trove
Shared: Platformer · Retro · 2D

Sonic Mania
Shared: Platformer · 2D · Retro

Hollow Knight
Shared: Platformer · 2D · Singleplayer

Celeste
Shared: Platformer · 2D · Singleplayer

Rogue Legacy 2
Shared: Platformer · Action · Arcade

Gravity Circuit
Shared: Action · Platformer · 2D

Sonic Origins
Shared: Action · Platformer · Retro

Bloodstained: Curse of the Moon
Shared: Action · Platformer · 2D

Mark of the Ninja
Shared: Platformer · Action · 2D

VVVVVV
Shared: Platformer · 2D · Retro

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

Downwell
Shared: Platformer · Action · 2D

The Messenger
Shared: Platformer · Retro · 2D

Volgarr the Viking
Shared: Platformer · Action · 2D

Rogue Legacy
Shared: Platformer · Action · 2D

Broforce
Shared: Action · 2D · Platformer

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

Jump King
Shared: Platformer · Action · 2D

BIT.TRIP RUNNER
Shared: Platformer · Action · 2D

Rayman® Legends
Shared: Platformer · Action · 2D

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