Can you play together across different systems? - So, Dead Island 2 is here and you
Dead Island 2 multiplayer: How to play co-op and what progress carries over?
Dead Island 2 Players Can't Host Co-Op Games If They're On A Base-Model Last-Gen Console - GameSpot
Technical FAQs
Base' PS4 / Xbox One consoles can't host Dead Island 2 co-op at launch
Dead Island 2 Cross Platform Guide: Is Dead Island 2 Cross Play?
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Dead Island 2 Co-op and Cross-Play: What You Need to Know
Is Dead Island 2 going to offer cross platform support
Will Dead Island 2 be cross-play? - Answered
Dead Island 2 HELL-A Edition Xbox One, Xbox Series X - Best Buy