Games like Grand Pigeon's Duty
Games like Grand Pigeon's Duty include Marvel Rivals, The Test, Escape From Duckov, Plants vs. Zombies: Battle for Neighborville™, and PUBG: BATTLEGROUNDS. We matched them by the tags players give Grand Pigeon's Duty on Steam (Choose Your Own Adventure, Side Scroller, Hero Shooter, Third-Person Shooter, and Top-Down Shooter): closest matches first, and among equally close ones the better-known games.

Marvel Rivals
Shared: Hero Shooter · Third-Person Shooter · Shooter

The Test
Shared: Choose Your Own Adventure · Visual Novel · Simulation

Escape From Duckov
Shared: Top-Down Shooter · Third-Person Shooter · Shooter

Plants vs. Zombies: Battle for Neighborville™
Shared: Third-Person Shooter · Hero Shooter · Shooter

PUBG: BATTLEGROUNDS
Shared: Shooter · Third-Person Shooter · Action

Hitler is my crush
Shared: Side Scroller · Hero Shooter · Third-Person Shooter

Warframe
Shared: Third-Person Shooter · Action RPG · RPG

Eastern Exorcist
Shared: Side Scroller · RPG · Action

The Ascent
Shared: Top-Down Shooter · Shooter · RPG

Rogue Legacy 2
Shared: Arcade · Difficult · Side Scroller

鬼谷八荒 Tale of Immortal
Shared: Choose Your Own Adventure · RPG · Simulation

The Wolf Among Us
Shared: Choose Your Own Adventure · Visual Novel · Adventure

The Life and Suffering of Sir Brante
Shared: Choose Your Own Adventure · Visual Novel · RPG

Geometry Dash
Shared: Difficult · Side Scroller · 2D

Remnant: From the Ashes
Shared: Third-Person Shooter · RPG · Shooter

Suzerain
Shared: Choose Your Own Adventure · Visual Novel · RPG

Slay the Princess — The Pristine Cut
Shared: Choose Your Own Adventure · Visual Novel · Psychological Horror

Senren * Banka
Shared: Third-Person Shooter · Visual Novel · Casual

Broforce
Shared: Side Scroller · Action · Shooter

60 Seconds! Reatomized
Shared: Choose Your Own Adventure · Strategy · 2D

Long Live The Queen
Shared: Visual Novel · Difficult · Choose Your Own Adventure

Caster
Shared: Third-Person Shooter · Action · Indie

The Test: Hypothesis Rising
Shared: Choose Your Own Adventure · Visual Novel · Simulation

60 Seconds!
Shared: Choose Your Own Adventure · Difficult · Strategy