Anno 117: Pax Romana is the best online city building game you can play with friends right now, and Forge of Empires is the answer if you want zero downloads and zero dollars. Those two picks sit at opposite ends of a category that search results treat as one thing, which is why so many people end up installing something they did not want.
Search city building games online and you get two completely different products filed under one phrase, and the store pages do a poor job of telling them apart. Picking the wrong one costs you an evening and sometimes sixty dollars. So start with what separates them.
What You Actually Get From City Building Games Online
Co-op city building means two to four people sharing one economy or one map, usually on a paid PC release. It is the closer fit if what you want is to build a place together and argue about zoning. Browser city building means a free account, a server full of other players, and a design that assumes you check in twice a day rather than sit down for four hours.
The genre has fewer true multiplayer city building games than the search volume suggests, because simulating a city is expensive and simulating one that four people are editing at once is much worse. The five below are the ones that actually ship the feature instead of promising it.
1. Anno 117: Pax Romana
This is the pick for a group of two to four who want the real thing. Anno 117 launched on November 12, 2025 with online co-op and online PvP, plus crossplay so the console friend is not left out. Roman provinces give you two distinct starting cultures and supply chains that get genuinely tangled around the fourth population tier.
Be honest about the reception before you spend $59.99. Steam user reviews sit at 65 percent positive across more than five thousand of them, and the complaints are consistent: the campaign story is thin and the first months shipped rougher than Ubisoft wanted. The city building underneath is not in dispute. Buy it for the sandbox and the co-op, not the narrative.
2. Anno 1800
The older Anno is still the deeper one, and it is the better buy if your group is patient. Up to four players share a session, and because it has been out since 2019 it goes on sale constantly, which matters when everyone in the group has to own a copy. Industrial-era logistics across island chains remains the high point of the series.
The problem is the DLC wall. Three season passes and a pile of standalone packs sit between the base game and the version people talk about online, and getting a group aligned on which add-ons everyone owns is a real conversation you will have to have. Start with the base game and add packs only when the group agrees.
3. Eco
Eco is the most genuinely multiplayer thing on this list and the only one where other players can ruin the map. Everyone shares one server world with a simulated ecosystem, so overfishing a river or clear-cutting a forest has consequences that outlast the session. At $29.99 from Strange Loop Games it is also the cheapest serious pick here, with online and LAN co-op both supported.
This one needs a committed group and it punishes casual play harder than anything else here. A server with four people who log in weekly will stall, and public servers have a habit of emptying out three weeks in. If your friends will not commit to a schedule, pick something else. If they will, nothing else feels like this.
4. Go-Go Town!
Go-Go Town is the low-friction option and the one to pick if the group includes people who do not play strategy games. It left early access on July 16, 2026 and supports online co-op plus shared-screen play on the couch, which almost nothing else in this category does. You run a tourist town hands-on, hauling stock and fixing roads yourself.
The trade-off is depth. There is no meaningful failure state and the automation systems run out of new ideas somewhere around the twenty hour mark, so treat $27.99 as the price of a good fortnight rather than a permanent fixture. Two players is the sweet spot. Four turns the town into a traffic jam of mayors.
5. Forge of Empires
If the requirement is no download, this is the one. Forge of Empires runs in a browser tab, costs nothing to start, and has been going since 2012, which in browser game terms is geological. You push a settlement from the Stone Age forward through eras, and the turn-based hex battles give it more actual decision-making than its competitors bother with.
Understand what free costs here. Progress runs on production timers and a premium currency that shortens them, guild events lean on daily attendance, and the late eras are a grind designed to convert patient players into paying ones. Play it as a twice-a-day habit and it is genuinely good. Play it as a weekend project and the paywall arrives fast. The mobile client shares your account if you want it on a phone too.
The Rest of the Browser Shelf
Elvenar is the same InnoGames formula in a fantasy skin with a prettier layout puzzle and a slower economy, and it is worth a look if the historical eras bore you. Goodgame Empire leans castle-and-siege rather than city sim, so it belongs closer to the large-scale MMORTS end of the shelf. All of them share the same bargain: free to start, monetized by time. If you want a browser tab without that trade, the turn-based side of browser strategy is where the honest free games ended up.
Which One Fits Your Group
Three friends who all own gaming PCs and want one long campaign should buy Anno 1800 on sale and skip the DLC for now. The same group with money to spend and a taste for something current should take Anno 117 instead. A mixed group where half the people do not play strategy wants Go-Go Town.
A group that wants a persistent world and will actually show up should run an Eco server, and anyone who needs a city builder online on a work laptop with no install rights is looking at Forge of Empires. If your real interest is the scale of shared maps rather than the building, our writeup on long-campaign online war games covers that side properly. For the single-player greats, the full city builder ranking is the better starting point. More of these land every year on our rankings desk. The rest of what we play lives at Strategygame.org.
Frequently Asked Questions
What is the best online city building game to play with friends?
Anno 117: Pax Romana, if everyone can spend $59.99. It supports one to four players in online co-op with crossplay between PC and console. Anno 1800 is the cheaper pick for the same group because it goes on sale often and plays deeper.
Are there city building games you can play with no download?
Yes. Forge of Empires and Elvenar both run entirely in a browser tab with a free account, no client and no install rights needed. Both are monetized through production timers rather than an upfront price, so expect to check in daily rather than binge.
Do any city builders have real co-op rather than just multiplayer?
Anno 1800 and Anno 117 both let several players share a single session and economy. Eco goes further with one persistent server world where every player’s resource use affects everyone else. Go-Go Town adds shared-screen co-op on the same machine.
Is Forge of Empires free to play properly?
Free to play, yes. Free to rush, no. Buildings and research run on timers that Diamonds shorten, and the later eras are paced to make paying feel reasonable. Treat it as a twice-daily habit and it costs nothing worth mentioning.
What are good multiplayer city building games under $30?
Eco at $29.99 and Go-Go Town at $27.99 are the two worth your money. Eco is the serious one with a shared ecosystem and server politics. Go-Go Town is the relaxed one that works with players who have never touched a city builder.
