Looking for a small, open-source parser game

As Graham put it (in TCoA), Advent “was generally considered at the time, and ever since, to be in the public domain, on what legal grounds it’s hard to see”. But the original authors seem to have been happy to have others expand it and port it and so on, so I doubt it’ll ever be tested in court.

Works that were published in the US prior to January 1, 1978 without a copyright notice do not have any copyright protection in the US. I believe Advent falls into this category and so all good.

Also, if there is a work you want to port that is under copyright, try contacting the rights holder and asking permission. You might be pleasantly surprised.

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