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Co-Op Instructions To HOST a Co-Op Game From the Main Menu, click the CO-OP button. Click HOST GAME. The lobby screen appears with: A lobby code in the format XXX-XXX (e.g. A3F-K92) — automatically copied to your clipboard. Only host can modify world creation settings (name, theme, seed). Share the lobby code with your friend. Wait for your friend(s) to join — they'll appear in the players panel. Maximum 4 players/session. When everyone is in, click ST...