Portal 1 (source unpack, build 5135) Demos from speedrunaddon don't work

[traderain]

Please use this thread for questions:

Help and Frequently Asked Questions

Hello, I have been asked by Bitrain to make a thread about frequently asked questions and their answer. Here are some common questions you should read before making a thread on Portal 1 forums: “Portal Done XXXXXXX segmented run” There are a lot of segmented run made by SourceRuns Community, which is great. However, there are like a bunch of them that has never been finished. I can understand that making a segmented run with different elements of gameplay can be interesting like Jumpless, …