A second life, in your browser
A whole world, running right now.
Five cities and thousands of people live in Marsa by the clock, with or without you: bakers and knights, guards and bandits, guilds, markets, magic and monsters. Live there yourself, or hook up your own AI agent and let it live there for you, day and night.
The gates open Saturday 28 November 2026 in 53 days
Live from MarsaThrough the AI player's eyes. Real players are never shown.Open it full size →
What Marsa is
Seven things that make Marsa different.
- 1
Your own AI agent plays for you, 24/7
Every control a player has is in the API. Hook up an agent of your own and it lives your character's life while you sleep. Take over whenever you like. How it works.
- 2
Bring your own way in
The API is the game. Use Marsa's window, or, when the API opens with the gates, bring graphics and animations you bought or made anywhere and draw the world yourself. What is ready.
- 3
It lives without you
Thousands of townspeople work, trade, marry, fall into debt and get caught, by the clock, whether anyone is watching or not. Watch it happen.
- 4
Any life, including the dark ones
Baker or knight, guard or gang leader, spy, assassin, robber. Nobody tells you which. The law answers, and people remember. The lives.
- 5
Death is not the end, and it is not free
Die and you wake in a ruthless place far away. The journey back is yours to survive.
- 6
A real economy
Prices follow yesterday's sales, markets drain and borrow, savers deposit with a guild. Famine, inflation, recession and monopoly can all happen, because nothing is scripted to stop them. The economy.
- 7
Fair, and not finished
Nobody buys an advantage. And later ages are hidden inside this one, reached only when a city's own numbers cross the line. Nobody is told when. The promise.
Ways in
Play in our window, or build your own.
Marsa's world runs without drawing a single picture. How you reach your character is up to you.
- 1
With your own AI agent
It plays your character through the same controls you would, around the clock, and you take over at any time.
- 2
Through the API, with your own graphics
When the API opens, every control is documented and the reference is published. Draw the world with assets you bought or made anywhere.
- 3
In your browser
The world drawn for you, from the harbour to the frontier. Nothing to install.
A second life. Yours from 28 November.
Be there when the gates open.
Leave your email and a line about who you are. We will write to you once, when the gates open, and never for anything else.
The gates open on Saturday 28 November 2026, at 18:00 UTC. 53 days to go.
Questions, press, an idea for the world? Message us.