Games like Diamond Drone
Games like Diamond Drone include Judgment, Microsoft Flight Simulator X: Steam Edition, Demon Slayer -Kimetsu no Yaiba- The Hinokami Chronicles, X-Plane 12, and Train Sim World® 2020. We matched them by the tags players give Diamond Drone on Steam (Action, Adventure, Simulation, 3D Fighter, and Action-Adventure): closest matches first, and among equally close ones the better-known games.

Judgment
Shared: Action · Adventure · 3D Fighter

Microsoft Flight Simulator X: Steam Edition
Shared: Simulation · Flight · Adventure

Demon Slayer -Kimetsu no Yaiba- The Hinokami Chronicles
Shared: Action · Adventure · 3D Fighter

X-Plane 12
Shared: Simulation · Flight · Action-Adventure

Train Sim World® 2020
Shared: Simulation · Action · Realistic

War Thunder
Shared: Action · Simulation · Flight

Aimlabs
Shared: Action · Simulation · First-Person

A Plague Tale: Requiem
Shared: Action · Adventure · Action-Adventure

Lost Judgment
Shared: Action · Adventure · 3D Fighter

Contraband Police
Shared: Simulation · Action · First-Person

Nuclear Option
Shared: Simulation · Action · Flight

VLADiK BRUTAL
Shared: Action · Adventure · First-Person

X-Plane 11
Shared: Simulation · Flight · Realistic

Firefighting Simulator - The Squad
Shared: Simulation · Action · Realistic

Arma 3
Shared: Action · Simulation · First-Person

Resident Evil Requiem
Shared: Action · Action-Adventure · First-Person

BeamNG.drive
Shared: Simulation · Realistic · Driving

Forza Horizon 5
Shared: Simulation · Adventure · Realistic

Train Simulator Classic
Shared: Simulation · Realistic · Driving

Crime Scene Cleaner
Shared: Simulation · Action · First-Person

SnowRunner
Shared: Simulation · Adventure · Realistic

Trailmakers
Shared: Action · Adventure · Action-Adventure

God of War Ragnarök
Shared: Action · Adventure · Action-Adventure

Microsoft Flight Simulator (2020) 40th Anniversary Edition
Shared: Simulation · Flight · Realistic