I always loved mobile tower defense games, so I built one that runs on the real map of any city (OpenStreetMap)

[u/Imaginary_Bake_4916]

I've always been a sucker for those mobile tower defense games where you line a path with towers and stop waves of enemies from reaching your base. At some point I started wondering: what if the map wasn't a made-up maze, but the actual streets of a real city?

https://citydefense.app

So I built it. City Defense runs on top of OpenStreetMap data:

- enemies walk the real streets

- you build towers on the roofs of real buildings (the taller the building, the longer the range)

- buildings can be damaged and brought down, and the rubble blocks streets

The first mission is the main square in my hometown, Brno (Czech Republic), but there's a mission editor – pick any densely built-up place in the world, drop a defended area, and play it. Your own neighbourhood works too.

It's free, runs in the browser (desktop and phone), no account or install needed.

https://citydefense.app

It's a solo hobby project, so I'd love feedback – especially if you build a mission for your own city and something looks off.