How to play Cities Skylines sandbox: CS1 Content Manager (unlimited money/unlock), -devmode and mods (81 Tiles, Move It, TM:PE), and CS2's cheat toggles.
Cities Skylines Sandbox Guide — Dev Mode, Cheats & How to Play (CS1 + CS2)
The short version: "Sandbox" in Cities Skylines means two layers. The base game is already failure-free free building (no campaign, no forced goals); "sandbox mode" means removing the last constraints — unlimited money, everything unlocked, every tile usable. CS1 does it with the built-in Content Manager mods (unlimited money/soil, full unlock) plus the -devmode launch parameter for the developer UI; CS2 has cheat toggles built straight into the main-menu Content Manager. If you're searching "how to do sandbox in city skylines," you want the concrete steps — this guide takes you from enabling it to basic gameplay.
Official resources: Steam store page (CS1) · Steam store page (CS2) · CS1 official Wiki — mods · Wikipedia — Cities: Skylines · Wikipedia — Cities: Skylines II
What "Sandbox" Actually Means
- The base layer: CS has no traditional "failure" — go bankrupt and you can take loans or reload; no monsters, no wars; the only pressure is your own planning.
- The sandbox layer (this guide's topic): turn off money and unlock constraints and play it purely as a "toybox" game.
- The difference: normal mode has money-management pressure; sandbox = unlimited money + everything unlocked + all tiles, so you only design and admire.
City painters, video makers, and layout testers should go sandbox immediately. New players who want the management pressure should play normal first — CS's economic pressure is gentle, with plenty of warnings before bankruptcy.
CS1: Three Ways to Enable Sandbox
Method 1: Built-in mods (recommended) Main menu → Content Manager → Mods tab → enable the built-in:
- Unlimited Money
- Unlimited Soil (unlimited terrain resources)
- Unlock All (all buildings/milestones)
Method 2: -devmode developer mode
Right-click CS1 in Steam → Properties → add -devmode to launch options → press ~ in-game to open the developer UI with commands like "Get More Money" (for players who want more control).
Method 3: Third-party mods (advanced) Subscribe to 81 Tiles on the Workshop (unlock all 81 map tiles instead of 9) — the city-painter's core mod, combined with unlimited money for whole-map planning.
In CS1, enabling unlimited money/full unlock marks some saves as "cheated," but it doesn't break the game; to go back to normal, just disable the toggles in Content Manager (it doesn't affect existing saves, only new build demands).
CS2: Sandbox/Cheat Toggles (Built-In, No Mods)
CS2 made cheats an official feature:
- Main menu → Content Manager → enable unlimited money / full unlock toggles (this path is confirmed by the community and outlets like PCGamesN).
- New cities created afterward start with them active; CS2 has had these toggles built in since launch — no mods needed.
- CS2's mod ecosystem runs on Paradox Mods (official); tool mods like Move It have been ported by the community — more in the DLC guide.
CS1's "sandbox" leans on built-in mods + Workshop (81 Tiles is mandatory). CS2 supports cheat toggles natively, and its tile system is already 441 tiles (no 81 Tiles equivalent needed) — CS2 gives city painters a full tier more freedom, at the cost of the performance bar (see the system requirements guide).
Essential Sandbox Mods (CS1, Workshop)
| Mod | What it does | Priority |
|---|---|---|
| 81 Tiles | Unlock all 81 map tiles | Must-have |
| Unlimited Money / Unlock All | Built-in; sandbox core | Must-enable |
| Move It | Fine-tune road/building positions (community #1 rec) | Strongly recommended |
| TM:PE | Traffic management (lanes, intersection control) | Strongly recommended |
| Fine Road Anarchy | Draw roads ignoring rules | City painters |
| Node Controller | Intersection/node fine control | Advanced |
Basic Gameplay: 30-Minute Onboarding (Normal Mode Flow)
- Roads first: hook one arterial road to the highway exit; don't grid-spam from the start.
- Zone: lay residential (R), commercial (C), and industrial (I) along roads — keep housing away from industry.
- Power & water: build a power plant + water pumps/towers and connect them; keep budget at 100% first.
- Services: past ~1,000 population, add schools, clinics, fire, and police.
- Traffic is the real game: your Traffic Flow percentage is your actual "score"; when it jams, use one-way roads, roundabouts, and interchanges.
- Expand: milestones unlock new tiles → buy land → continue; in sandbox the whole map is available immediately.
Don't grid out all 9 tiles at once (budget death). Don't put industry next to housing (pollution drives residents out). Don't neglect the power/water budget (100% is the floor). For traffic headaches, pick a flat map to start — see the maps guide.
Frequently Asked Questions
How do I enable sandbox mode in Cities Skylines?
CS1: Main menu → Content Manager → Mods → enable built-in Unlimited Money / Unlimited Soil / Unlock All (plus Workshop's 81 Tiles). CS2: turn on the cheat toggles in the main-menu Content Manager.
What is dev mode in Cities Skylines?
CS1's -devmode launch parameter unlocks a developer UI (~ to open) with commands like adding money; for most players the built-in Content Manager toggles are enough.
Does Cities Skylines 2 have cheats?
Yes. CS2 has built-in unlimited-money/full-unlock toggles (main menu → Content Manager) — no mods required.
What are the best Cities Skylines mods?
CS1: 81 Tiles, Move It, TM:PE (traffic), Unlimited Money. CS2: the official Paradox Mods platform plus community-ported tools.
Is Cities Skylines hard?
Not really — there's no failure state and the management pressure is gentle; the real difficulty is late-game traffic and city scale (which also gets hardware-hungry).
Related Guides
- Cities Skylines 2 Maps Guide — Every Map, the Editor & Custom Maps (2026)
- Cities Skylines 2 DLC Guide — Every Expansion & What's Worth It (2026)
- Cities Skylines 2 System Requirements & PC Guide — Can Your PC Run It? (2026)
- Cities Skylines 1 vs 2 — Which Should You Play in 2026?
- Is Cities Skylines Multiplayer? Co-op, Mods and the Honest Answer (2026)
Last updated: August 12, 2026.