Stardew Valley on mobile now includes a secret experimental multiplayer mode unlocked with the Konami code

Not content with throwing load of documented new features into Stardew Valley on mobile with this week's long-awaited 1.6 update, it turns out developer Eric "ConcernedApe" Barone also chucked in a pretty major unannounced one too; a secret experimental multiplayer mode is now available to mobile players, if they're feeling sufficiently brave.

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source https://www.eurogamer.net/stardew-valley-on-mobile-now-includes-a-secret-experimental-multiplayer-mode-unlocked-with-the-konami-code