Dungeons & Dragons

The game is owned by a public company and has published its rules under a permissive copyleft licence. Here are the key ‘open’ artefacts.

1. The Player’s handbook ( .pdf wayback machine) and my .pdf mirror
2. The Player’s handbook (.torrent)
3. The OGL 1.0a & SRD 5.1 (.pdf wizards) and my .pdf mirror
4. The OGL & SRD 5.1 (.torrent)
5. DnD Beyond’s SRD 5.2 landing page and my mirror of SRD 5.2

See also a resource index on my wiki in an article that tried to track the whole scandal. In short, WOTC backed down.