Games like ALYUP
Games like ALYUP include Celeste, Downwell, Super Meat Boy, SANABI, and Geometry Dash. We matched them by the tags players give ALYUP on Steam (Precision Platformer, Turn-Based Tactics, 2D Platformer, Platformer, and Arcade): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Platformer · 2D Platformer

Downwell
Shared: Precision Platformer · Platformer · 2D Platformer

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

SANABI
Shared: 2D Platformer · Action · Platformer

Geometry Dash
Shared: Precision Platformer · 2D · Platformer

Sonic Superstars
Shared: 2D Platformer · Platformer · Action

Super Mombo Quest
Shared: Precision Platformer · Action · Arcade

VVVVVV
Shared: Precision Platformer · Platformer · 2D Platformer

Rogue Legacy 2
Shared: Arcade · Platformer · Action

I wanna be the Creator
Shared: Platformer · Action · Precision Platformer

BlazBlue Entropy Effect
Shared: Platformer · Action · 2D

Trine 5: A Clockwork Conspiracy
Shared: Action · Platformer · 2D Platformer

Thomas Was Alone
Shared: Platformer · Precision Platformer · 2D Platformer

Mina the Hollower
Shared: 2D Platformer · Action-Adventure · Platformer

Sonic Origins
Shared: 2D Platformer · Action · Platformer

Castlevania: Belmont's Curse
Shared: 2D Platformer · Action · Platformer

Pizza Tower
Shared: 2D Platformer · Platformer · Action

Ambidextro
Shared: Precision Platformer · 2D Platformer · Action

Katana ZERO
Shared: Action · Platformer · 2D Platformer

Twin Shot Deluxe
Shared: 2D Platformer · Action · Arcade

Prince of Persia The Lost Crown
Shared: 2D Platformer · Precision Platformer · Action

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

Rusted Moss
Shared: Platformer · Precision Platformer · Action

Jump King
Shared: Precision Platformer · Platformer · Action