Is it legal to create an alternative implementation of proprietary game server?
posted 3 years ago
There are various multiplayer MOBA or MMORPG games, that have availability to public documentation for their proprietary server protocols, and only have one official client that provides an access to their services - for free or for a fee. For example, World of Warcraft, Lineage, DotA, League of Legends, etc.
Would it be legal, under US and EU law, to reverse engineer their clients, document their client-server protocol, and recreate server software that would be compatible with the official client, but containing no copyrighted code by original authors?
Would it be also legal to charge for using such private server software?
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