October 6, 2026
Play Urban Terror in central Lisbon: a map built with Opus 5.5
A map for a multiplayer shooter was built using OpenStreetMap data, with real streets and buildings around Praça do Comércio.
@levelsio
@levelsio
🇵🇹 I tried making a Lisbon map for Urban Terror with Opus 5.5, and it worked! It uses real OSM map data for the city center around Praça do Comércio, with actual buildings. It's not quite exact, but pretty close. I've always wanted to play online with friends in real cities, and now we can! I set it as the default map at http://ut.pieter.com 😊
I keep going more niche with reverse engineered web-based versions of games 👉 http://ut.pieter.com 👈 6 months ago I tried to reverse engineer Urban Terror Urban Terror was kind of a Counter-Strike style mod on top of the Quake 3 Arena engine, I think @Erwin_AI got me to play this during COVID Because it runs on Quake 3's engine like RTCW and Q3 itself, I thought I could just use ioquake3 and WASM to run it on web, then add a multiplayer server and it'd just work... But no it didn't, I got stuck 6 months ago, it was buggy and wouldn't work, I kept trying and kinda got it to load but not really play Today I tried it again with Opus 5.5 and again, I couldn't get it to work, giving up I did a last try with Fable 5.1 on high effort and it after awhile it did figure out the issue! "The engine's struct was 4 bytes longer than what UT's bytecode expects, everything after that point (the entity count and the entity list) was read 4 bytes off" It rewrote the bytecode and made it work! So now we have another game preserved, running 100% the web via WASM, with a multiplayer server tied to it, so you can play with your friends 😊 Every model that comes out makes a bit more things possible and you can just keep trying old things that didn't work before I see lots of people mod modern games now too which looks very cool too Here I'm playing it with @marckohlbrugge a few minutes ago! Anyway you can play it with everyone else at http://ut.pieter.com now :D
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On Oct 6, central Lisbon became the default map in the browser version of Urban Terror. Pieter Levels built it with Opus 5.5.
Six months ago. Levels tried to bring Urban Terror to the browser but got stuck on bugs. It is a Counter-Strike-style shooter built on the Quake 3 Arena engine. Now its browser version lets players play on a map of a real city.
A city from map data. Levels used OpenStreetMap data for the blocks around Praça do Comércio. The result is an approximation of central Lisbon where you can play with friends.
Lisbon is already set as the default map at ut.pieter.com.
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