Yeah you need to provide gamefiles but those are available on blizzards website, you need a valid cdkey to play tho.
Dunno if they really care that much as https://pathofdiablo.com/p/ has been up and running for a long time and have a lot of active players.
Hi, could you look in to a PvPGN and D2GS server?
Tried to get it to work myself but im quite clueless when it comes to this :p
https://forums.pvpgn.pro/viewtopic.php?id=1875