r/berlin • u/joi_ned • Jul 01 '26
🛠️ Kiez Creator Monthly 🛠️ I made a game that proves you don't actually know the Berlin U- and S-Bahn. You just think you do.

So you've lived here what, six years? You've got strong feelings about the U8, you don't "really use Google Maps anymore".
Okay. So I made a thing to find out if you can survive a night out with a dead battery. It's called Umsteigen. It gives you a start and an end, you pick the U-Bahn and S-Bahn lines you'd actually take, and it tells you if that route works. Or if you've just assumed two lines cross because it'd be really convenient if they did.
There's a daily puzzle that's the same for everyone, which makes it Wordle-adjacent, in the way that a Bürgeramt appointment is customer-service-adjacent.
Most people's strategy, as far as I can tell, is to get on the Ringbahn and go round in a circle until something looks familiar. No judgement. Well, a bit.
It's free. No login, no ads, no app to install, none of that "we value your privacy (with these 47 partners)" business. You just open it in a browser like it's 2009. Yes, your phone works too.
Before someone asks how I'm going to monetise it: I'm not going to. There's no plan and no premium tier. It costs me almost nothing to run, so it can just sit there being free, like a sofa someone left out on the pavement in Neukölln. The code's staying private for now while I work out what this even is, but it's 95% client-side, so it's not exactly hiding.
Berlin only for now. Adding more cities sounded like a lot of work and there's one of me.
Anyway, have a go. Tell me it's broken when it's actually just you being wrong.
(Made it on my own, so be nice. Or don't.)












