The community edition is open source, the Enterprise edition is not.

I host my own gitlab-ce instance in docker which works well. I mainly needed a web UI for git and I track issues with it. I think there are boards or at least free plugins for the community version, but I do not use them. You can version your documentation in .md files too. Not sure if it can substitute Jira for you, but you mentioned Bugzilla and I like gitlab a lot more.

Just make sure to update the container regularly, you can’t make big version jumps without the intermediate updates.

I think you can combine it with OpenProject if you need more project planning.

As you already implied: when you’re not at home but travelling.

You are aware that the impossible sections were on purpose to sell hint books and to make money with the telephone hintline which one could call being stuck?

I have never ever heard of a game coming with a help hotline. And I played a lot of games in that time. TIL that

one classic example is the game “The Legend of Zelda” for the NES. The game contained cryptic puzzles and secrets that were not easily solvable. Nintendo provided a hotline, called the Nintendo Power Line, where players could call in for tips, tricks, and solutions. Calls to the hotline were not free, creating an additional revenue source for the company.