Games like StackFortress
Games like StackFortress include RimWorld, Oxygen Not Included, Spacebase DF-9, Space Engineers, and Prison Architect. We matched them by the tags players give StackFortress on Steam (Simulation, Strategy, Early Access, Tower Defense, and Sandbox): closest matches first, and among equally close ones the better-known games.

RimWorld
Shared: Strategy · Sandbox · Simulation

Oxygen Not Included
Shared: Base Building · Simulation · Singleplayer

Spacebase DF-9
Shared: Simulation · Strategy · Sci-fi

Space Engineers
Shared: Simulation · Sandbox · Building

Prison Architect
Shared: Simulation · Sandbox · Strategy

Manor Lords
Shared: Strategy · Simulation · Base Building

Jurassic World Evolution
Shared: Simulation · Strategy · Sandbox

Dyson Sphere Program
Shared: Simulation · Base Building · Sci-fi

Cities: Skylines
Shared: Simulation · Strategy · Sandbox

Cliff Empire
Shared: Strategy · Simulation · Sci-fi

Banished
Shared: Strategy · Simulation · Sandbox

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Strategy

Stellaris
Shared: Strategy · Simulation · Sci-fi

Jurassic World Evolution 2
Shared: Simulation · Strategy · Sandbox

Rise to Ruins
Shared: Tower Defense · Strategy · Simulation

Cities: Skylines II
Shared: Simulation · Sandbox · Strategy

Hardspace: Shipbreaker
Shared: Simulation · Sci-fi · Sandbox

Creeper World 3: Arc Eternal
Shared: Strategy · Tower Defense · Simulation

Castle Story
Shared: Strategy · Sandbox · Tower Defense

Against the Storm
Shared: Simulation · Strategy · Base Building

The Riftbreaker
Shared: Tower Defense · Base Building · Sandbox

Kingdom Two Crowns
Shared: Tower Defense · Strategy · Singleplayer

Space Haven
Shared: Strategy · Simulation · Base Building

Stonehearth
Shared: Strategy · Simulation · Sandbox

