Games like Gunner Deadly Expedition
Games like Gunner Deadly Expedition include Celeste, Super Meat Boy, Momodora: Reverie Under The Moonlight, SANABI, and Geometry Dash. We matched them by the tags players give Gunner Deadly Expedition on Steam (Precision Platformer, Spectacle fighter, Side Scroller, 2D Platformer, and Shoot 'Em Up): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · 2D Platformer · Difficult

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

Momodora: Reverie Under The Moonlight
Shared: Side Scroller · 2D Platformer · Spectacle fighter

SANABI
Shared: 2D Platformer · Adventure · Side Scroller

Geometry Dash
Shared: Precision Platformer · Difficult · Side Scroller

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

VVVVVV
Shared: Precision Platformer · 2D Platformer · Difficult

Downwell
Shared: Precision Platformer · 2D Platformer · Difficult

Bzzzt
Shared: Precision Platformer · 2D Platformer · Score Attack

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

Jump King
Shared: Precision Platformer · Difficult · Adventure

Dungeon Escape
Shared: Precision Platformer · 2D Platformer · Difficult

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

Will You Snail?
Shared: Precision Platformer · 2D Platformer · Difficult

Huntdown
Shared: Side Scroller · Shoot 'Em Up · Precision Platformer

Hitler is my crush
Shared: Side Scroller · Shoot 'Em Up · Third-Person Shooter

Alex Kidd in Miracle World DX
Shared: Precision Platformer · 2D Platformer · Difficult

NINJA GAIDEN: Ragebound
Shared: 2D Platformer · Side Scroller · Difficult

Pogostuck: Rage With Your Friends
Shared: Precision Platformer · Side Scroller · Difficult

1 Screen Platformer
Shared: Precision Platformer · 2D Platformer · Side Scroller

Super Meat Boy Forever
Shared: Precision Platformer · Side Scroller · Difficult

ICEY
Shared: Side Scroller · Spectacle fighter · Adventure

Warhammer 40,000: Shootas, Blood & Teef
Shared: Side Scroller · 2D Platformer · Shoot 'Em Up

Bō: Path of the Teal Lotus
Shared: Precision Platformer · Side Scroller · 2D Platformer