I wish there were still a fork of it somewhere. I understand that he wants to honor Valve's request, but it was too cool of a project to just...disappear like that.
It looks like someone already uploaded the code to the internet archive with git history https://archive.org/download/portal64_202401/portal64-repo.z... for stuff like this it is often better to search the manual uploads to internet archive instead of by URL.
It looks like this link is dead too.
Honor request? You mean they sent lawyers and C and Ds after him. There needs to be the software equivalent of the ACLU to defend open source authors.
He still has to honor the request, even if it is for legal reasons. All Im saying is, I wish there were viable forks available so we could still play it