Games like Propa.
Games like Propa. include STAR WARS™ Empire at War - Gold Pack, Age of History 3, Forts, Kerbal Space Program, and Bio Inc. Redemption. We matched them by the tags players give Propa. on Steam (Strategy, RTS, Minimalist, Physics, and Moddable): closest matches first, and among equally close ones the better-known games.

STAR WARS™ Empire at War - Gold Pack
Shared: Strategy · RTS · Moddable

Age of History 3
Shared: Strategy · RTS · Wargame

Forts
Shared: Strategy · Physics · Moddable

Kerbal Space Program
Shared: Physics · Moddable · Simulation

Bio Inc. Redemption
Shared: Strategy · Medical Sim · Outbreak Sim

People Playground
Shared: Physics · Moddable · Destruction

112 Operator
Shared: Moddable · Strategy · RTS

Plague Inc: Evolved
Shared: Strategy · Outbreak Sim · Simulation

Men of War: Assault Squad 2
Shared: Strategy · RTS · Simulation

Wargame: Red Dragon
Shared: Strategy · RTS · Wargame

Company of Heroes 2
Shared: Strategy · RTS · Tactical

BeamNG.drive
Shared: Physics · Moddable · Simulation

Call to Arms - Gates of Hell: Ostfront
Shared: Strategy · RTS · Moddable

Total War: WARHAMMER II
Shared: Strategy · RTS · Tactical

Steel Division 2
Shared: Strategy · RTS · Simulation

Total War: MEDIEVAL II – Definitive Edition
Shared: Strategy · RTS · Moddable

Age of Empires II (Retired)
Shared: Strategy · RTS · Tactical

Garry's Mod
Shared: Moddable · Physics · Simulation

Broken Arrow
Shared: Strategy · RTS · Wargame

Crusader Kings III
Shared: Strategy · RTS · Simulation

Mini Motorways
Shared: Strategy · Minimalist · Simulation

Cities: Skylines
Shared: Strategy · Moddable · Simulation

Company of Heroes 3
Shared: Strategy · RTS · Wargame

Rusted Warfare - RTS
Shared: Strategy · RTS · Moddable