Games like PeriAreion
Games like PeriAreion include FTL: Faster Than Light, Plague Inc: Evolved, Stellaris, Kerbal Space Program, and Game Dev Tycoon. We matched them by the tags players give PeriAreion on Steam (Strategy, Indie, Simulation, and Space): closest matches first, and among equally close ones the better-known games.

FTL: Faster Than Light
Shared: Strategy · Space · Indie

Plague Inc: Evolved
Shared: Strategy · Simulation · Indie

Stellaris
Shared: Strategy · Space · Simulation

Kerbal Space Program
Shared: Simulation · Space · Indie

Game Dev Tycoon
Shared: Indie · Simulation · Strategy

Totally Accurate Battle Simulator
Shared: Simulation · Strategy · Indie

Spacebase DF-9
Shared: Simulation · Space · Strategy

Mini Motorways
Shared: Strategy · Simulation · Indie

Space Pirates And Zombies 2
Shared: Strategy · Space · Indie

Banished
Shared: Strategy · Simulation · Indie

911 Operator
Shared: Strategy · Simulation · Indie

Particle Fleet: Emergence
Shared: Strategy · Indie · Simulation

The Long Journey Home
Shared: Strategy · Simulation · Indie

Between the Stars
Shared: Space · Simulation · Indie

Mini Metro
Shared: Strategy · Simulation · Indie

X4: Foundations
Shared: Simulation · Space · Strategy

Battlevoid: Harbinger
Shared: Strategy · Simulation · Space

Cosmoteer: Starship Architect & Commander
Shared: Space · Indie · Strategy

Papers, Please
Shared: Indie · Simulation · Strategy

Dyson Sphere Program
Shared: Space · Simulation · Strategy

Total Tank Simulator
Shared: Strategy · Simulation · Indie

Dictators:No Peace Countryballs
Shared: Strategy · Simulation · Indie

IXION
Shared: Strategy · Space · Simulation

Democracy 3
Shared: Strategy · Simulation · Indie