https://wccftech.com/dark-souls-iii-battle-royale/

Dark Souls III, the latest entry in the series developed by From Software, originally featured an additional multiplayer mode which didn’t make it in the final release.

According to well-known Dark Souls and Bloodborne data miner Lance McDonald, Dark Souls III featured a Battle Royale mode. It’s not clear how it would have worked, and how many players would have been able to take part in a match, but it would have definitely been interesting to see how it worked.