
About
Design and build metro systems in real-world cities using accurate population and employment data. Strategically place stations and choose track types to manage passenger flow and network efficiency.
What's New in Underline
1.1.2
November 3, 2026
Underline now speaks your language. The interface is translated into Czech, Danish, Dutch, Finnish, French, German, Greek, Hungarian, Italian, Norwegian, Polish, Portuguese (Brazilian and European), Romanian, Russian, Spanish, Swedish, Turkish and Ukrainian, and follows whatever language your device is set to. The download is smaller too: map data for two cities the game had no way to open has been removed.
MoreSubscriptions & In-App Purchases
$2.99
Mumbai
Build the network in Mumbai. Yours for good.
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FAQ
What cities are available in Underline?
Underline features 35 cities across five continents, including London and Tokyo. Five cities, one from each continent, are available for free.
How does Underline model passenger demand?
Demand is modeled from real population and employment data, ensuring that station placement directly impacts ridership and revenue.
Can I play Underline offline?
Yes, Underline works entirely offline, with no account, ads, or tracking required.
What are the building options in Underline?
You can choose to build tunnels, elevated tracks, or surface tracks, each with its own associated costs and strategic implications.
How many commissions are there in Underline?
There are 110 commissions to complete, ranging in difficulty from straightforward to genuinely hard.
What is the pricing for Underline?
The app is free to download and includes five cities and fifty commissions. A single in-app purchase unlocks all remaining cities, commissions, and an unlimited budget.
Does Underline have ads?
No, Underline is ad-free and does not feature any advertisements.
What devices is Underline compatible with?
Underline is compatible with iPhone and iPad devices.





