Games like Reactor Tech²
Games like Reactor Tech² include Cities: Skylines, Cities: Skylines II, Manor Lords, Prison Architect, and Kingdoms and Castles. We matched them by the tags players give Reactor Tech² on Steam (Economy, Real Time Tactics, City Builder, Management, and PvE): closest matches first, and among equally close ones the better-known games.

Cities: Skylines
Shared: City Builder · Management · Economy

Cities: Skylines II
Shared: City Builder · Economy · Management

Manor Lords
Shared: City Builder · Strategy · Management

Prison Architect
Shared: Management · City Builder · Strategy

Kingdoms and Castles
Shared: City Builder · Management · Strategy

Planet Zoo
Shared: Management · Economy · City Builder

Transport Fever 2
Shared: Management · Strategy · Economy

Planet Coaster
Shared: Management · Economy · Strategy

Foundation
Shared: City Builder · Management · Strategy

Workers & Resources: Soviet Republic
Shared: City Builder · Strategy · Economy

Jurassic World Evolution
Shared: Management · Economy · Strategy

Tropico 6
Shared: City Builder · Economy · Strategy

Anno 1800
Shared: City Builder · Economy · Strategy

Against the Storm
Shared: City Builder · Strategy · Management

Jurassic World Evolution 2
Shared: Management · Economy · City Builder

Planet Coaster 2
Shared: City Builder · Strategy · Economy

Empires of the Undergrowth
Shared: City Builder · Strategy · Management

Mad Games Tycoon 2
Shared: Economy · Management · City Builder

Prehistoric Kingdom
Shared: Management · Economy · Strategy

Ostriv
Shared: City Builder · Strategy · Management

Farthest Frontier
Shared: City Builder · Economy · Strategy

SimCity™ 4 Deluxe Edition
Shared: City Builder · Economy · Management

Timberborn
Shared: City Builder · Management · Building

Stronghold: Definitive Edition
Shared: City Builder · Real Time Tactics · Strategy