https://www.youtube.com/watch?v=HulO5oR4SaUNot sure if this counts as full blown multiplayer, but my free amateur game project Pixurbia has an online turf war system that players can participate in. The territories and gang fights breaking out are synced up between players, and the gang that's winning the turf war receives more money and protection while the losing gang members get attacked more frequently. There's also a daily synced market determining the prices of various things.>Game links (play for free)https://progchad.itch.io/pixurbiahttps://gx.games/games/r5r8eb/pixurbia/>Wiki (not finished but has useful info)https://pixurbia.miraheze.org/