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

Celeste
Shared: Difficult · Pixel Graphics · 2D Platformer

SANABI
Shared: Pixel Graphics · 2D Platformer · Action

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

Downwell
Shared: Pixel Graphics · 2D Platformer · Arcade

VVVVVV
Shared: Pixel Graphics · 2D Platformer · Difficult

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

Exit the Gungeon
Shared: Arcade · Pixel Graphics · Bullet Hell

Katana ZERO
Shared: Pixel Graphics · 2D Platformer · Action

The Messenger
Shared: Pixel Graphics · Retro · Platformer

Jump King
Shared: Difficult · Pixel Graphics · Platformer

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

UFO 50
Shared: Pixel Graphics · Arcade · Retro

Volgarr the Viking
Shared: Difficult · Platformer · Retro

Vampire Survivors
Shared: Pixel Graphics · Bullet Hell · Arcade

Sonic Origins
Shared: 2D Platformer · Pixel Graphics · Action

Rain World
Shared: Difficult · Pixel Graphics · Platformer

Enter the Gungeon
Shared: Pixel Graphics · Difficult · Bullet Hell

Rogue Legacy 2
Shared: Arcade · Platformer · Difficult

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

SUPER CHICKEN JUMPER
Shared: Difficult · Pixel Graphics · Arcade

Pepper Grinder
Shared: 2D Platformer · Difficult · Arcade

I wanna be the Creator
Shared: Action-Adventure · Difficult · Action

Garbanzo Quest
Shared: 2D Platformer · Pixel Graphics · Platformer

Angry Video Game Nerd Adventures
Shared: Difficult · Platformer · Pixel Graphics