Play as Boulder, Colorado
Boulder is a sovereign city-nation of Colorado — Rocky Mountain spine, aerospace, energy, high plains. Colorado sits above it as the federation head, the Crown of the bloc, the way Washington DC once stood over America. Boulder runs its own treasury, its own resources, and it offers citizenship to anyone who asks. Claim it, found your nation, and your capital lands on the real coordinates of Boulder.
Boulder is offering citizenship
Open borders. Anyone can apply, no reputation check, no invitation needed. City-nations carry 50% more money and resources than an ordinary state, and they share what they hold with their citizens.
Request citizenship in Boulder
Boulder keeps open borders and reviews every application. Sign in to apply.
Apply for CitizenshipColorado is the Crown
Colorado doesn't compete with its cities — it presides over them as the federation head, the seat of the bloc, the way Washington DC once stood over America. It sets the bloc budget, fields the federal army (120,049 soldiers, 4,434 tanks) and holds a balanced posture. If you go to war, you can pay the Crown in SFC dollars to fight alongside you, provided it's backing three or fewer wars at that moment.
Other city-nations of Colorado
Questions about Boulder
What do I do first after claiming Boulder?
Set your tax rate, collect your first day's revenue, pick a government, and build infrastructure before you buy soldiers. Military upkeep sinks new nations faster than any enemy does.
Why claim Boulder instead of another state?
Location shapes trade proximity, who sees your mobilisations, and which coalition armies are cheap to reach. Boulder puts you in Colorado's wider interior, which is a different opening than the capital.
Is playing from Boulder free?
Yes, entirely. No download, no paywall, no premium tier — Boulder plays in your browser on desktop or phone.
Can two players claim Boulder?
Each player anchors their own nation, and multiple nations can trace their origin to Boulder. What separates you is what you build — population, treasury, technology and army.
Which states border Boulder?
Inside Colorado you'll be neighbours with Colorado Springs, Aurora and Fort Collins. Any of them can be claimed by another real player, so the state you pick decides who's next door.