[2020] Crash - need help

We'll need to see the output_log.txt (called player.log on Mac and Linux) to see what's causing it. Here's where to find the log depending on your operating system. To easily find the local files for the game, right click your game in the Steam library, select Properties, go to the Local Files tab and select Browse local files.

Windows
\SteamApps\common\Cities_Skylines\Cities_Data\output_log.txt

Mac OS X
Users//Library/Logs/Unity/Player.log

Linux
~/.config/unity3d/Colossal Order/Cities: Skylines/Player.log

As we can't attach files here on Steam, you will need to upload the file somewhere else. Here's a few sites you can upload it to, which do not require you to sign up first:

https://uploadfiles.io/ - free, no sign-up, can handle large log files
https://paste.ee/ - fast, no sign-up required (some log files will be too large for it though)
https://zerobin.net/ - bit clunky, but can handle huge files, no sign-up required

Originally posted by Halan: My Linux install sometimes crashes with "Receiving unhandled NULL exception" and sometimes the simulation gets stuck (I cannot unpause the game).
In the latter case there's no crash report or anything in my log. Is there maybe a way to turn on more verbose logging?

I do not have any obscure mods installed, just network extensions, and traffic manager.

Can you upload your player.log somewhere anyways? There might not be anything that looks out of the ordinary for you, but maybe we can spot something helpful. :)