Best city-builders and colony sims on the Steam Machine
City-builders and colony sims lean on the CPU, not the GPU — exactly where the Steam Machine's 6-core Zen 4 shines. Honest picks, plus the late-game reality.
City-builders and colony sims are the one big genre where the Steam Machine's balance of parts makes unusual sense: they barely tax the GPU but hammer the CPU in the late game, and the Machine pairs a modest RDNA 3 GPU with a 6-core, 12-thread Zen 4 that is genuinely well-suited to the work. If you plan to grow sprawling cities and hundred-colonist bases from the couch, this is a stronger match than the raw spec sheet suggests. Below are the titles worth owning, an honest read on where the late game slows down, and the links to each game's full verdict.
Why this genre suits the Steam Machine
Most demanding games stress the GPU: more pixels, more effects, higher frame-rates. City-builders and colony sims flip that. Their heavy work is simulation — pathfinding for thousands of agents, traffic, production chains, resource ticks, weather, and AI schedules — and that runs on the CPU. Rendering a top-down or isometric city at 1080p or 1440p is not what pushes the hardware; recalculating the whole living world every tick is.
That is exactly the load the Machine's Zen 4 handles well. The 6-core, 12-thread chip has the single-thread speed that matters most for simulation tick-rate, plus enough cores for the games that spread work across threads. You are rarely GPU-bound here, so the Machine's 8 GB VRAM and mid-range GPU are not the limiting factor — the CPU is, and it is the right part for the job.
The essential city-builders
The classics of the genre — build, zone, manage, and watch a metropolis breathe.
- Cities: Skylines — Still the reference city-builder, deep and endlessly moddable. Its sequel, Cities: Skylines II, pushes visuals and simulation much further and is the more CPU-hungry of the two.
- Anno 1800 — The most beautiful builder on this list: layered production chains, trade, and island economies that scale into serious late-game complexity.
- Banished — A tight, unforgiving medieval village sim. Small in scope, light to run, and a perfect couch time-sink.
Each title above links to its full red/amber/green Steam Machine verdict — click through before you buy.
Colony sims and survival management
Smaller populations than a city, but far deeper per-agent simulation — every colonist thinks, needs, and can ruin your day.
- RimWorld — The genre's storytelling king. An AI storyteller drives emergent disasters across a colony of individuals with moods, injuries, and grudges.
- Oxygen Not Included — A brutal underground base sim where you manage gases, heat, plumbing, and power down to the tile. Famous for late-game simulation load.
- Against the Storm — A roguelite city-builder in short, punchy runs — a smart pick if you want the genre without a 300-hour save.
- Frostpunk — Society survival in a frozen apocalypse, where every heating decision is a moral one. Its sequel, Frostpunk 2, scales the same tension up to whole-city politics.
Planet-scale and space builders
When one city isn't enough, these zoom out to whole worlds and orbits.
- Planetbase — Manage a self-sustaining off-world colony against a hostile planet. Compact and approachable.
- The Universim — A "god game" builder where you nurture a civilization from the stone age into space.
- Kerbal Space Program — Not a city-builder, but the ultimate engineering sandbox: design rockets, obey physics, and fail hilariously. The physics solver is CPU-bound as your builds grow.
Sandbox survival with a management heart
- Project Zomboid — A hardcore isometric zombie survival sim with deep base-building and a huge simulated world. It leans hard on the CPU as the map and horde density scale up.
The honest late-game caveat
Here is the part no spec sheet tells you: in this genre, hardware sets a ceiling but the simulation is what slows down. As cities cross tens of thousands of agents or colonies fill with dozens of thinking pawns, the per-tick cost climbs — and much of it runs on a single thread. That is a property of the games, not the Machine. Even a high-end desktop crawls in a maxed-out Cities: Skylines save or a giant late-game RimWorld colony. The Machine's fast Zen 4 cores push that wall out further than most consoles could, but they do not remove it. Judge these games by simulation smoothness late in a save, not by frame-rate, and expect the biggest cities to gradually tick slower no matter what you play them on.
Playing them on a TV and controller
This is the genre's real friction on the Machine. City-builders and colony sims are mouse-and-keyboard-native, and dense menus rarely map cleanly to a gamepad. Some — Frostpunk, Against the Storm, Cities: Skylines — ship decent controller support, but for the rest you will want a wireless mouse and keyboard on the coffee table, or SteamOS desktop mode. The Machine's Proton compatibility for these games is broad, but controller-friendliness varies a lot per title, so check each verdict page.
Honesty note
SteamFPS verdicts for these games are derived from Steam and SteamOS compatibility data, not measured on the hardware. We do not publish invented frame-rate numbers. Treat the per-game red/amber/green verdict as a confidence signal, and read exactly how we reach it on our methodology page.
For the full catalogue, browse the Simulation genre hub and our best strategy games on the Steam Machine collection.