Games like Pixel Pirate
Games like Pixel Pirate include Celeste, SANABI, Super Meat Boy, Anomaly Agent, and Terraria. We matched them by the tags players give Pixel Pirate on Steam (Adventure, 2D Platformer, Tactical, Pirates, and Precision Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · 2D Platformer · Pixel Graphics

SANABI
Shared: 2D Platformer · Adventure · Pixel Graphics

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

Anomaly Agent
Shared: 2D Platformer · Side Scroller · 2D Fighter

Terraria
Shared: Adventure · 2D · Pixel Graphics

Momodora: Reverie Under The Moonlight
Shared: 2D Platformer · Side Scroller · Pixel Graphics

VVVVVV
Shared: 2D Platformer · Precision Platformer · Pixel Graphics

Downwell
Shared: Precision Platformer · 2D Platformer · Pixel Graphics

Noita
Shared: Pixel Graphics · 2D · Adventure

Blasphemous 2
Shared: Adventure · 2D Platformer · Side Scroller

Prince of Persia The Lost Crown
Shared: 2D Platformer · Adventure · Side Scroller

Door Kickers: Action Squad
Shared: 2D Platformer · Pixel Graphics · Tactical

Thank Goodness You're Here!
Shared: Adventure · 2D Platformer · 2D

Home Behind
Shared: Adventure · Side Scroller · Indie

Knock-knock
Shared: 2D Platformer · Adventure · Side Scroller

Jump King
Shared: Adventure · Precision Platformer · 2D

DAVE THE DIVER
Shared: Adventure · Pixel Graphics · Casual

The Escapists
Shared: 2D · Pixel Graphics · Adventure

Kingdom Rush - Tower Defense
Shared: Tactical · 2D · Adventure

Rain World
Shared: Adventure · 2D · 2D Platformer

Lone Fungus
Shared: Adventure · 2D Platformer · Precision Platformer

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

UFO 50
Shared: Adventure · 2D · Pixel Graphics

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